Giuggioli, Dilia, et al. “The Treatment of Skin Ulcers in Systemic Sclerosis: Use of Granulocyte-Colony Stimulating Factor (G-CSF) in 26 Patients”. Reumatismo, vol. 58, no. 1, Mar. 2006, pp. 26-30, doi:10.4081/reumatismo.2006.26.