Modi, Hiral N, et al. “CORRELATION BETWEEN PULMONARY THROMBOEMBOLIC COMPLICATIONS DETECTED BY CT PULMONARY ANGIOGRAPHY IN COVID-19 PNEUMONIA PATIENTS WITH CLINICAL, D-DIMER LEVEL, CTSI SCORE AND ITS PROGNOSTIC IMPLICATION- A RETROSPECTIVE STUDY”. National Journal of Medical Research, vol. 11, no. 02, June 2021, pp. 53-58, https://njmr.in/index.php/file/article/view/17.