Further normalisation papers:

One-step real-time duplex reverse transcription PCRs simultaneously quantify analyte and housekeeping gene mRNAs.
Wang C, Gao D, Vaglenov A, Kaltenboeck B.
Biotechniques. 2004 36(3):508-16, 518-9.

Gene expression studies in prostate cancer tissue: which reference gene should be selected for normalization?
Ohl F, Jung M, Xu C, Stephan C, Rabien A, Burkhardt M, Nitsche A, Kristiansen G, Loening SA, Radonic A, Jung K.
J Mol Med. 2005 83(12): 1014-1024.

Housekeeping gene variability in normal and cancerous colorectal, pancreatic, esophageal, gastric and hepatic tissues.
Rubie C, Kempf K, Hans J, Su T, Tilton B, Georg T, Brittner B, Ludwig B, Schilling M.
Mol Cell Probes. 2005 19(2): 101-109.

Selection of ovine housekeeping genes for normalisation by real-time RT-PCR,  analysis of PrP gene expression and genetic susceptibility to scrapie.
Garcia-Crespo D, Juste RA, Hurtado A.
BMC Vet Res. 2005 28; 1:3

Determination of an internal control to apply reverse transcription quantitative PCR to study stress response in the lactic
acid bacterium Oenococcus oeni.

Desroche N, Beltramo C, Guzzo J.
J Microbiol Methods. 2005 60(3):325-33.

Evaluation of potential reference genes in real-time RT-PCR studies of Atlantic salmon.
Olsvik PA, Lie KK, Jordal AE, Nilsen TO, Hordvik I.
BMC Mol Biol. 2005 Nov 17;6:21.

Selection of reference genes for quantitative real-time PCR in bovine preimplantation embryos.
Goossens K, Van Poucke M, Van Soom A, Vandesompele J, Van Zeveren A, Peelman LJ.
BMC Dev Biol. 2005 5: 27.

mRNA and 18S-RNA coapplication-reverse transcription for quantitative gene expression analysis.
Zhu LJ, Altmann SW.
Anal Biochem. 2005 345(1): 102-109.

Evaluation of housekeeping genes in placental comparative expression studies.
Meller M, Vadachkoria S, Luthy DA, Williams MA.
Placenta. 2005 26(8-9): 601-607

GeneChip, geNorm, and gastrointestinal tumors: novel reference genes for real-time PCR.
Mark Kidd,1 Boaz Nadler,2 Shrikant Mane,3 Geeta Eick,1 Maximillian Malfertheiner,1 Manish Champaneria,1 Roswitha Pfragner,4 and Irvin Modlin1
1Gastrointestinal Research Group and 3Keck Laboratory, Yale University School of Medicine, New Haven, Connecticut; 2Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel and  4Instituteof Pathophysiology, Centre for Molecular Medicine, Medical University of Graz, Austria
Physiol Genomics (2007) 30:  363–370

Selection of housekeeping genes for gene expression studies in larvae from flatfish using real-time PCR.
Infante C, Matsuoka MP, Asensio E, Cañavate JP, Reith M, Manchado M.
BMC Mol Biol. 2008 Mar 6;9:28

Evaluation and validation of candidate endogenous control genes for real-time quantitative PCR studies of breast cancer
Roisin E McNeill*, Nicola Miller and Michael J Kerin
BMC Molecular Biology 2007, 8:107

Validation of rat reference genes for improved quantitative gene expression analysis using low density arrays.
Jenny Hong Cai, Shibing Deng, Steven W. Kumpf, Patricia A. Lee, Panayiotis Zagouras, Anne Ryan, and Dan S. Gallagher
BioTechniques (2007) 42: 503-512

Selection of housekeeping genes for gene expression studies in the adult rat submandibular gland under normal, inflamed, atrophic and regenerative states
Nicholas Silver*, Emanuele Cotroneo, Gordon Proctor, Samira Osailan,
Katherine L Paterson and Guy H Carpenter
BMC Molecular Biology 2008, 9:64

Real-Time PCR Quality Control for Gene Expression Profiling Using the LightCycler® 480 System
Jasmien Hoebeeck, Filip Pattyn, Nurten Yigit, Els De Smet, Frank Speleman, and Jo Vandesompele*
Center for Medical Genetics, Ghent University Hospital, Belgium
Biochemica 2/2007, pages 7-9. ©Springer Medizin Verlag 2007

Characterization of housekeeping genes in zebrafish: male-female differences and effects of tissue type, developmental stage and chemical treatment

Amy T McCurley and Gloria V Callard
BMC Molecular Biology 2008, 9:102

Universal reference method for real-time.
Neil Ivan Bower, Ralf Joachim Moser, Jonathan Robert Hill, and Sigrid Arabella Lehnert
BioTechniques (2007) 42: 199-206

Instability of standard PCR reference genes in adipose-derived stem cells during propagation, differentiation and hypoxic exposure
Trine Fink, Pia Lund, Linda Pilgaard, Jeppe Grøndahl Rasmussen,
Meg Duroux and Vladimir Zachar
BMC Molecular Biology 2008, 9:98

In search of suitable reference genes for gene expression studies of human renal cell carcinoma by real-time PCR.
Monika Jung, Azizbek Ramankulov, Jan Roigas, Manfred Johannsen, Martin Ringsdorf, Glen Kristiansen & Klaus Jung
BMC Molecular Biology 2007, 8:47

Normalization of gene expression measurements in tumor tissues: comparison of 13 endogenous control genes
de Kok JB, Roelofs RW, Giesendorf BA, Pennings JL, Waas ET, Feuth T, Swinkels DW, Span PN.
Lab Invest. 2005 85(1): 154-159
Reference genes identified in SH-SY5Y cells using custom-made gene arrays with validation by qPCR
Hoerndli FJ, Toigo M, Schild A, Gotz J, Day PJ.
Anal Biochem. 2004 335(1): 30-41

Similar sequence-free amplification of human glyceraldehyde-3-phosphate dehydrogenase for real time RT-PCR applications
Gianni Carraro*, Giovanna Albertin, Myriam Forneris, Gastone G. Nussdorfer
Molecular and Cellular Probes (2005)

Validating internal controls for quantitative plant gene expression studies
Amy M Brunner, Igor A Yakovlev and Steven H Strauss
Department of Forest Science, Oregon State University, Corvallis, OR 97331-5752, USA and 2Skogforsk/ Norwegian Forest Research; Institute, Hogskoleveien 12, N-1432 As, Norway
BMC Plant Biology 2004, 4:14

Validation of internal control genes for gene expression analysis in diabetic glomerulosclerosis.
Biederman J, Yee J, Cortes P.
Kidney Int. 2004 66(6): 2308-2314
Selection of Normalizer Genes in Conducting Relative Gene Expression Analysis of Embryos
Qin J. Zhang, Antony Chadderton, Robert L. Clark, and Karen A. Augustine-Rauch*
Department of Reproductive Toxicology, Safety Assessment, GlaxoSmithKline, King of Prussia, Pennsylvania
Birth Defects Research (Part A) 67:533–544 (2003)
Sex genes for genomic analysis in human brain: internal controls for comparison of probe level data extraction
Hanga C Galfalvy, Loubna Erraji-Benchekroun, Peggy Smyrniotopoulos,
Paul Pavlidis, Steven P Ellis, J John Mann, Etienne Sibille and Victoria Arango
BMC Bioinformatics 2003, 4:37
Single muscle fiber gene expression in human skeletal muscle: validation of internal control with exercise
Bozena Jemiolo and Scott Trappe
BBRC - Biochemical and Biophysical Research Communications 320 (2004) 1043–1050
Exogenous Reference RNA for Normalization of Real-Time Quantitative PCR
Reginald D. Smith, Benjamin Brown, Pranvera Ikonomi, and Alan N. Schechter
National Institutes of Health Bethesda, MD, USA
BioTechniques 34:88-91 (January 2003)
Unsuitability of Using Ribosomal RNA as Loading Control for Northern Blot Analyses Related to the Imbalance between Messenger and Ribosomal RNA Content in Rat Mammary Tumors
Montserrat Solanas, Raquel Moral, and Eduard Escrich
Department of Cellular Biology, Physiology and Immunology, Faculty of Medicine, Universitat Autonoma de Barcelona, Spain.
Analytical Biochemistry 288, 102–104 (2001)