M. Arreghini, P. Prudente, W. Maglione, C. Arnoldi, S. Tosi, and A. Marchesoni, “Tolerability, safety and efficacy of Iloprost infusion without peristaltic pump in systemic sclerosis”, Reumatismo, vol. 53, no. 2, pp. 140–144, Jun. 2001.