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2. Prospective study of outpatients with extensive colitis;Lennard-Jones, J.E.; Misiewicz, J.J.; Parrish, J.A.; Ritchie, J.K.; Swarbrick, E.T.; Williams, C.B.;Lancet,1974
3. Cancer in colitis: assessment of the individual risk by clinical and histological criteria;Lennard-Jones, J.E.; Morson, B.C.; Ritchie, J.K.; Shove, D.C.; Williams, C.B.;Gastroenterology,1977
4. Cancer surveillance in ulcerative colitis;Lennard-Jones, J.E.; Morson, B.C.; Ritchie, J.K.; Williams, C.B.;Lancet,1983
5. Dysplasia in inflammatory bowel disease: standardized classification with provisional clinical applications;Riddell, R.H.; Goldman, H.; Ransohoff, D.F.;Hum Pathol,1983