1. McKinney,J.O.: J. Amer. Oil Chemists' Soc.50, 79?84 (1973)
2. Dollear,F.G., Gardner,H.K.jr.: Proc. Fourth. Nat. Res. Conf. (1972) von 81
3. Goldblatt,L.A.: Econ Bot.22, 51 (1968)
4. Gardner,H.K.jr.: J. Assoc. Offic. Anal. Chemists48, 70 (1971)
5. Andrellos,P.L.: J. Assoc. Offic. Anal. Chemists50, 346?350 (1967)