“Effects of Bosentan on the Skin Temperature of Hands and Feet in Patients With Connective Tissue Diseases Complicated With Raynauds Phenomenon: A Prospective, Open-Label, Uncontrolled, Single-Center Study”. Global Journal of Medical Research, vol. 15, no. F2, Mar. 2015, pp. 7-15, https://medicalresearchjournal.org/index.php/GJMR/article/view/900.