“ Extract from Leaf of Psidium Guajava L Depresses the Guinea Pig Atrial Contractility by Interfering With Potassium and Calcium Channels ”. Brazilian Journal of Pharmaceutical Sciences 45, no. 3 (September 1, 2009): 483–489. Accessed May 3, 2024. https://www.revistas.usp.br/bjps/article/view/10705.