References
- Anderson , S. R. 1955 . Development of pods and seeds of birdsfood trefoil, Lotus corniculatus L., as related to maturity and to seed yields. . Agronomy journal , 47 : 483 – 487 .
- Brown , C. S. 1955 . Hard seed in birdsfoot trefoil , Ithaca , , New York : Cornell University . Unpublished PhD thesis
- International Seed Testing Association . 1985 . International Rules for seed testing . Seed science and technology , 13 : 299 – 355 .
- Li , Qingfeng and Hill , M. J. 1989 . A study on the causes of the protracted flowering pattern in birdsfoot trefoil (Lotus corniculatus L.) . Journal of applied seed production , 7 (in press)
- MacDonald , H. A. 1946 . Birdsfoot trefoil (Lotus corniculatus L.) Its characteristics and potentialities as a forage legume , Cornell University Agriculture Experimental Station .
- Winch , J. E. 1958 . Development, crop management, and harvest of birds foot trefoil (Lotus corniculatus L.) seed , Ithaca , , New York : Cornell University . Unpublished PhD thesis