Saxena, D., D. Jain, M. Yadav, K. Giri, T. Yadav, and P. jain. “Late Onset Systemic Sclerosis With Seronegativity: A Rare Presentation of an Uncommon Disease”. Reumatismo, vol. 71, no. 3, Oct. 2019, pp. 166-70, doi:10.4081/reumatismo.2019.1170.