Dr. Lakshmi Monika puvvada, D. A. T. . Patel, Dr. R. T. Sachdeo, and Dr. Mitesh Thakkar. “Electrocardiographic Changes in Young Healthy Male Smokers”. International Journal of Medical Science and Clinical Research Studies, vol. 2, no. 12, Dec. 2022, pp. 1421-4, doi:10.47191/ijmscrs/v2-i12-10.