PRACE DOKTORSKIE - FINLANDIA 300,370 GULLICHSEN RISTO The biofragmentable ring in intestinal surgery / by Risto Gullichsen ; from the Department of Surgery, University of Turku, Turku, Finland. - [Oslo ; Stockholm : Scandinavian University Press], 1993. -31 s. s il. ; 28 cm (Acta Chirurgica, suppl. 5b 9) ISBN 951-880-922-4