Vriend, G (March 1990). "WHAT IF: a molecular modeling and drug design program". Journal of Molecular Graphics. 8 (1): 52–6, 29. doi:10.1016/0263-7855(90)80070-v. PMID2268628.
Vriend, G (March 1990). "WHAT IF: a molecular modeling and drug design program". Journal of Molecular Graphics. 8 (1): 52–6, 29. doi:10.1016/0263-7855(90)80070-v. PMID2268628.