1. Schneider, M., inLecithins, edited by B.F. Szuhaj, American Oil Chemists' Society, Champaign, 1989, pp. 111.
2. Kullenberg, F.W., inIbid., edited by B.F. Szuhaj, American Oil Chemists' Society, Champaign, 1989, pp. 238.
3. List, G.R., inIbid., edited by B.F. Szuhaj, American Oil Chemists' Society, Champaign, 1989, pp. 147.
4. Szuhaj, B.F. (ed.),Ibid., American Oil Chemists' Society, Champaign, 1989, pp. 238.
5. Weete, J.D., and G. Griffin, U.S. Patent 4,943,389 (1990).