Strausberg, Feingold, Grouse et al.: "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. ..." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 99, Issue 26, pp. 16899-903, 2002 (PubMed).
Wu, Zhang, Cheng et al.: "Comparative DNA sequence analysis of mouse and human protocadherin gene clusters." in: Genome research, Vol. 11, Issue 3, pp. 389-404, 2001 (PubMed).
Nollet, Kools, van Roy: "Phylogenetic analysis of the cadherin superfamily allows identification of six major subfamilies besides several solitary members." in: Journal of molecular biology, Vol. 299, Issue 3, pp. 551-72, 2000 (PubMed).
Yagi, Takeichi: "Cadherin superfamily genes: functions, genomic organization, and neurologic diversity." in: Genes & development, Vol. 14, Issue 10, pp. 1169-80, 2000 (PubMed).
Wu, Maniatis: "Large exons encoding multiple ectodomains are a characteristic feature of protocadherin genes." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 97, Issue 7, pp. 3124-9, 2000 (PubMed).