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2. The ammonites Karakaschiceras and Neohoploceras (Valanginian Neocomitidae) from the Neuquén Basin, west-central Argentina;Aguirre-Urreta;Journal of Paleontology,1998
3. Estratigrafı́a y ammonites del Valanginiano superior de la región de Chos Malal, Cuenca Neuquina;Aguirre-Urreta;VIoCongreso Argentino de Paleontologı́a y Bioestratigrafı́a, Actas,1995
4. The ammonite sequence in the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina;Aguirre-Urreta;Geological Magazine,1997
5. Aguirre-Urreta, M. B. Rawson, P. F. 1998, Olcostephanid ammonoids (Valanginian-Hauterivian) from the Neuquén Basin, VII Congreso Argentino de Paleontologı́a y Bioestratigrafı́a (Bahia Blanca), 1998, 87