Crumpacker D W, Cederlöf R, Friberg L, Kimberling W J, Sörensen S, Vandenberg S G, Williams J S, McClearn G E, Grevér B, Iyer H, Krier M J, Pedersen N L, Price R A, Roulette I
Acta Genet Med Gemellol (Roma). 1979;28(3):173-95. doi: 10.1017/s0001566000009041.