Ebru ÇAKIR EDİS, et al. “Effectiveness of Thoracic Ultrasonography in the Evaluation of the Severity of Pulmonary Involvement in Patients With Systemic Sclerosis”. Archives of Rheumatology, vol. 31, no. 4, Dec. 2016, pp. 364-70, doi:10.5606/ArchRheumatol.2016.5849.