Authors: Ethington, RL Lehnert, O Repetski, JE

Citation: Rl. Ethington et al., Stiptognathus new genus (Conodonta : Ibexian, lower Ordovician), and the apparatus of Stiptognathus borealis (Repetski, 1982), J PALEONTOL, 74(1), 2000, pp. 92-100

Authors: Holmer, LE Popov, L Lehnert, O

Citation: Le. Holmer et al., Cambrian phosphatic brachiopods from the Precordillera of western Argentina, GFF, 121, 1999, pp. 227-242

Authors: Lehnert, O Bergstrom, SM Benedetto, JL Vaccari, NE

Citation: O. Lehnert et al., First record of Lower Silurian conodonts from South America: biostratigraphic and palaeobiogeographic implications of Llandovery conodonts in the Precordillera of Argentina, GEOL MAG, 136(2), 1999, pp. 119-131

Authors: Keller, M Buggisch, W Lehnert, O

Citation: M. Keller et al., The stratigraphical record of the Argentine Precordillera and its plate-tectonic background, GEOL SOC SP, (142), 1998, pp. 35-56

Authors: Keller, M Lehnert, O

Citation: M. Keller et O. Lehnert, The Rio Sassito sedimentary succession (Ordovician): a pinpoint in the geodynamic evolution of the Argentine Precordillera, GEOL RUNDSC, 87(3), 1998, pp. 326-344