A. Adamczyk-Ludyga, J. Wróbeł, M. Simka, T. Ludyga, P. Latacz, and M. Kazibudzki, “Retinal abnormalities in multiple sclerosis patients with associated chronic cerebrospinal venous insufficiency”, Veins and Lymphatics, vol. 1, no. 1, p. e2, Jun. 2012.