Hughes (1988). "Pattern of nucleotide substitution at major histocompatibility complex class I loci reveals overdominant selection". Nature. 335 (6186): 167-170. doi:10.1038/335167a0. PMID3412472.
Hughes (1988). "Pattern of nucleotide substitution at major histocompatibility complex class I loci reveals overdominant selection". Nature. 335 (6186): 167-170. doi:10.1038/335167a0. PMID3412472.