1. Skin lesions in ulcerative colitis;Johnson;Gut,1969
2. Ulcerative colitis; Treatment and prognosis, studies on the basis of 161 cases;Lindenberg;Acta Chir Scand (suppl),1958
3. Regional enteritis;Van Patter;Gastroenterology,1954
4. Dermatological manifestations of Crohn's disease;McCallum;Br J Dermatol,1968
5. The extraintestinal manifestations of regional ileitis; some comparisons with chronic ulcerative colitis;Cornell;J Mt Sinai Hosp,1955