Rao, KSPB., Hannart, JA., & Trouet, A. (1989). Vinblastine-c4 Alkyl Maleoyl and Amino-acid Maleoyl Derivatives .1. Chemistry and Physicochemical Data. Anticancer Research : international journal of cancer research and treatment, 9(3), 619-624. https://hdl.handle.net/2078.5/85250 (Original work published 1989)