Pinheiro, E. B. F. (2016) “SEASONAL AND CIRCADIAN VARIATION OF BARBATUSIN IN SAMPLES OF PLECTRANTHUS GRANDIS WILLENSE GROWN IN NORTHEAST BRAZIL”, International Journal of Pharmacy and Pharmaceutical Sciences, 8(7), pp. 124–128. Available at: https://www.journals.innovareacademics.in/index.php/ijpps/article/view/11064 (Accessed: 5 December 2025).