(untitled) - Kirshenbaum,K.; Barron,A.E.; Goldsmith,R.A.; Armand,P.; Bradley,E.K.; Truong,K.T.V.; Dill,K.A.; Cohen,F.E.; Zuckermann,R.N. (Proc. Natl. Acad. Sci. U.S.A., 1998)