Almazini, P., and A. M. Soesanto. “Global Longitudinal Strain and Myocardial Work Index in Post-COVID-19 Syndrome With Mild Symptoms: A Case Series”. Acta Medica Indonesiana, vol. 55, no. 3, Nov. 2023, p. 327, https://actamedindones.org/index.php/ijim/article/view/2141.