Soumyasil Das, Abhishek Mallick, and Subrata Kumar Pal. “A Study on Heart Failure With Preserved Ejection Fraction Among Patients of Type 2 Diabetes Mellitus in a Tertiary Care Hospital, India”. International Journal of Health and Clinical Research, vol. 5, no. 2, Jan. 2022, pp. 667-70, https://ijhcr.com/index.php/ijhcr/article/view/4777.