Citation
Stepshin, V.P., Ginter, E.K. (1974). Studies of homoeotic genes Antennopedix (Apx) and Nasobemia (Ns) of Drosophila melanogaster. I. Allelism of the genes Antennopedix and Nasobemia to the genes Antennapedia, Polycomb, and Extra sex comb. Sov. Genet. 8(8): 1021--1025.