Perkins JR, Dawes JM, Orengo C, McMahon SB, Bennett DL, Kohl M (2012). “ReadqPCR and NormqPCR: R packages for the reading, quality checking and normalisation of RT-qPCR quantification cycle (Cq) data.” BMC Genomics, 13, 296+. doi:10.1186/1471-2164-13-296, http://www.biomedcentral.com/1471-2164/13/296.