Powell, FC, AL Schroeter, RK Winkelmann, and GW. Dewald. 1986. “Chromosome Studies in Scleroderma With Consideration of Anticentromere Antibody Status and Assessment of Possible in Vitro Clastogenic Activity”. Acta Dermato-Venereologica 66 (5):414-18. https://doi.org/10.2340/0001555566414418.