Rao, KSPB., Debruyn, A., Trouet, A., Verzele, M., & Hannart, J. (1989). H-1-nmr and C-13 Nmr-study of 2 Vincristine Derivatives At 300 Mhz. Societes Chimiques Belges. Bulletin, 98(2), 125-132. https://hdl.handle.net/2078.5/139144 (Original work published 1989)