Avouac, J., Kowal-Bielecka, O., Landewe, R., Chwiesko, S., Miniati, I., Czirjak, L., Clements, P., Denton, C., Farge, D., Fligelstone, K., Földvari, I., Furst, D. E., Müller-Ladner, U., Seibold, J., Silver, R. M., Takehara, K., Toth, B. G., Tyndall, A., Valentini, G., van den Hoogen, F., Wigley, F., Zulian, F., Matucci-Cerinic, M., & , (2009). european League Against Rheumatism (EULAR) Scleroderma Trial and Research group (EUSTAR) recommendations for the treatment of systemic sclerosis: methods of elaboration and results of systematic literature research. Annals of the rheumatic diseases, 68(5), 629–634. http://access.bl.uk/ark:/81055/vdc_100135567461.0x000061