Galligioni, V., F. Dal Pozzo, G. Fontana, E. Bombardelli, E. Baldelli, and A. Scagliarini. 2009. “IN VITRO ANTIVIRAL ACTIVITY OF PROANTHOCYANIDIN A2 AGAINST CANINE DISTEMPER VIRUS”. African Journal of Traditional, Complementary and Alternative Medicines 6 (May):468-69. https://journals.athmsi.org/index.php/ajtcam/article/view/915.