Janakiraman, K., and R. Manavalan. “STUDIES ON EFFECT OF PIPERINE ON ORAL BIOAVAILABILITY OF AMPICILLIN AND NORFLOXACIN”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 5, no. 3, Apr. 2008, pp. 257-62, https://journals.athmsi.org/index.php/ajtcam/article/view/284.