1. Variation between observers in describing mucosal appearances in proctocolitis;Baron, J.H.; Connell, A.M.; Lennard-Jones, J.E.;Brit. med. J,1964
2. Ulcerative colitis: a follow-up investigation with mucosal biopsy studies;Dick, A.P.; Grayson, M.J.;Ibid,1961
3. Clinical experience with suction biopsy of the rectal mucosa;Flick, A.L.; Voegtlin, K.F.; Rubin, C.E.;Gastroenterology,1962
4. The value of rectal. biopsy in the diagnosis of ulcerative colitis;Matts, S.G.F.;Quart. J. Med,1961
5. Biopsy studies in ulcerative colitis;Truelove, S.C.; Richards, W.C.D.;Brit. med. J,1956