Authors: J Werner; K Z'graggen; C Fernández-del Castillo; K B Lewandrowski; C C Compton; A L Warshaw Journal: Ann Surg Date: 1999-06 Impact factor: 12.969
Authors: Werner Hartwig; Sasa-Marcel Maksan; Thomas Foitzik; Jan Schmidt; Christian Herfarth; Ernst Klar Journal: J Gastrointest Surg Date: 2002 May-Jun Impact factor: 3.452