Synthesis of 3-Substituted Ethyl 4,4,4-Trichloro-2-cyano-butanoates via Michael Addition to Ethyl 4,4,4-Trichloro-2-cyano-2-butenoate - Gaudemar-Bardone, Françoise; Mladenova, Margarita; Gaudemar, Marcel (Synthesis, 1988)