1. Banga, O.: Uineveredeling met gebruikmaking van inteelt en herstel door heterosis. Inst. Veredel. Tuinb. gew., Mededeling66, 391–400 (1955).
2. Comstock, R. E., H. F. Robinson andP. H. Harvey: A breeding procedure designed to make maximum use of both general and specific combining ability. Agron. J.41, 360–367 (1949).
3. Davis, G. N., andH. A. Jones: “San Joaquin”. Sth. Seedman9, 17 (1946); Ref. aus: Pl. Breed. Abstr.16, 480 (1946).
4. Erickson, H. T., andW. H. Gabelman: Potential value of inbreeds and F1-hybrid onions for seed production. Proc. Amer. Soc. Hort. Sci.64, 393–398 (1954).
5. Franklin, D. F., H. A. Jones andC. E. Peterson: Fiesta. Bull. Idaho agric. Exp. Sta. 211 (1954);