1898a Schellwien: 693. Fusulinids, schwagerinids, in dark red limestones and shales, at Neumarktl, (Oberkrain) [Trzic],                            Teufelsschlucht (Feistritz valley).
     1898b Schellwien: 358: Teufelsschlucht at Neumarktl [Trzic].
     1980  Kullmann & Ramovs: 195. Dolzanova soteska (Teufelsschlucht) at Trzic: Trogkofel limestone, upper part,
               red-coloured, very rich in fossils (fusulinids, crinoids, trilobites, brachiopods); ammonoids extremely rare,
               badly preserved and insufficiently known.