“Cost Minimization Analysis of Generic and Innovator Formulations of Metformin and Its Combination With Other Oral Antidiabetic Drugs”. International Journal of Research in Pharmacology & Pharmacotherapeutics, vol. 8, no. 4, Oct. 2019, pp. 481-7, https://doi.org/10.61096/ijrpp.v8.iss4.2019.481-487.