Placenta Percreta with Infiltration of the Pelvic Wall and Urinary Bladder - an Obstetrical Emergency - Kraemer, B; Solomayer, E -F; Becker, S; Schauf, B; Fehm, T; Wallwiener, D; Kraemer, E; Meyberg, G (Geburtshilfe und Frauenheilkunde, 2006)