Citation: P. Catsoulacos et al., ON THE FORMATION OF ESTRONE LACTAM ESTERS OF N,N-BIS(2-CHLOROETHYL)AMINOCINNAMIC ACID ISOMERS, P-N,N-BIS(2-CHLOROETHYL)AMINOPHENYLBUTYRIC ACID AND THEIR ANTITUMOR-ACTIVITY, Journal of heterocyclic chemistry, 32(3), 1995, pp. 1063-1065