Bowling A T, Nickel L S
J Hered. 1985 Jan-Feb;76(1):73-4. doi: 10.1093/oxfordjournals.jhered.a110028.
Data from mule offspring of mares bred to an AI-CD jack document that the control of AI-C and AI-D zone variants in Equus asinus is due to the action of autosomal, codominant alleles, AIC and AID.