Valente, E. J.; Trager, W. F.; Jensen, L. H. (1975). “The crystal and molecular structure and absolute configuration of (?)-(S)-warfarin”. Acta Crystallogr. B31 (4): 954-960. doi:10.1107/S056774087500427X.
Karlsson BC, Rosengren AM, Andersson PO, Nicholls IA (September 2007). “The spectrophysics of warfarin: implications for protein binding”. J Phys Chem B111 (35): 10520-8. doi:10.1021/jp072505i. PMID17691835.