H, G. T.; H, J. U.; N, B. P.; R, D. T.; R, T. P. A SYSTEMIC REVIEW ON CHALLENGES WITH CURRENTLY AVAILABLE CARDIOTONICS AND THEIR SAFER HERBAL ALTERNATES USED IN INDIA . International Research Journal of Pharmaceutical and Applied Sciences, v. 2, n. 1, p. 11-23, 29 Feb. 2012.