Pinheiro, E. B. F.; Silva, J. G. A.; Sampaio, C. G.; Fernandes, M. I. B.; Silva, M. G. V. SEASONAL AND CIRCADIAN VARIATION OF BARBATUSIN IN SAMPLES OF PLECTRANTHUS GRANDIS WILLENSE GROWN IN NORTHEAST BRAZIL. Int J Pharm Pharm Sci 2016, 8, 124-128.