Pfeiffer (2010) discusses Karstwannen (Karst depression,Uvala, Polje) of the Swabian Alb, the Franconian Jura and those of the Causses (southern France). „Die Karstwannen sind eigenständige Formen, die eine zeitweise großflächige Tieferlegung der Gesteinsoberfläche belegen, S. 210 (Karstwannen are a distinctive form element, confirming, there was a phase of extensive lowering of the rocky plane). Yet considering the terms uvala or polje, he is undecided, mainly because