Sharma, B. B., D. K. Mishra, T. Singh, N. Nargotra, R. K. Sharma, and P. Gupta. “Radiological Manifestation of Progressive Massive Fibrosis As a Complication of Silicosis-Case Report”. Nepalese Journal of Radiology, vol. 10, no. 1, Dec. 2020, pp. 34-37, doi:10.3126/njr.v10i1.29514.