1. Shai T, Isokoski M, Jussila J, Launiala K, Pyörälä K: Recessive inheritance of adult-type lactose malabsorption. Lancet 2:823?826, 1973
2. Sahi T: The inheritance of selective adult-type lactose malabsorption. Scand J Gastroenterol 9 (Suppl 30): 1?73, 1974
3. Ransome-Kuti O, Kretchmer N, Johnson JD, Gribble JT: A genetic study of lactose digestion in Nigerian families. Gastroenterology 68:431?436, 1975
4. Lisker R, Gonzales B, Daltabuit M: Recessive inheritance of the adult type of intestinal lactase deficiency. Am J Hum Genet 27:662?664, 1975
5. McCracken RD: Lactase deficiency: an example of dietary evolution. Curr Anthropol 12:479?517, 1971