Bridger, Gary J.; Skerlj, Renato T.; Padmanabhan, Sreenivasan; Martellucci, Stephen A.; Henson, Geoffrey W.; Struyf, Sofie; Witvrouw, Myriam; Schols, Dominique; De Clercq, Erik Journal of Medicinal Chemistry, 1999 , vol. 42, # 19 p. 3971 - 3981