1. Definition and diagnosis. In: Regional enteritis (Crohn's disease);Lennard-Jones, J.E.,1971
2. Clinical outcome of the first ten years of ulcerative colitis and proctitis;Ritchie, J.K.; Powell-Tuck, J.; Lennard-Jones, J.E.;Lancet,1978
3. Proctocolitis and Crohn's disease of the colon: a comparison of the clinical course;Lennard-Jones, J.E.; Ritchie, J.K.; Zohrab, W.J.;Gut,1976
4. Crohn's disease involving the colon: an audit of clinical management;Allan, R.; Steinberg, D.M.; Alexander Williams, J.; Cooke, W.T.;Gastroenterology,1977
5. Prognosis in Crohn's disease-based on results from a regional patient group from the county of Copenhagen;Binder, V.; Hendriksen, C.; Kreiner, S.;Gut,1985