Rana, Suraj, et al. “Left Ventricle Ejection Fraction Estimation by Point of Care Echocardiography in Patients Admitted in Intensive Care Unit”. Journal of Chitwan Medical College, vol. 10, no. 1, Mar. 2020, pp. 54-57, https://nepjol.info./index.php/JCMC/article/view/28072.