Levo A, Jääskeläinen J, Sistonen P, Sirén MK, Voutilainen R, Partanen J (1999). «Tracing past population migrations: genealogy of steroid 21-hydroxylase (CYP21) gene mutations in Finland». European Journal of Human Genetics7 (2): 188-96. PMID10196702. doi:10.1038/sj.ejhg.5200262.
Levo A, Jääskeläinen J, Sistonen P, Sirén MK, Voutilainen R, Partanen J (1999). «Tracing past population migrations: genealogy of steroid 21-hydroxylase (CYP21) gene mutations in Finland». European Journal of Human Genetics7 (2): 188-96. PMID10196702. doi:10.1038/sj.ejhg.5200262.