“AMMONITES OF THE SUBFAMILY ZAPALIINAE FROM THE LOWER TITHONIAN OF ESTANCIA MARÍA JUANA, VACA MUERTA FORMATION (PORTADA COVUNCO MEMBER), NEUQUÉN BASIN, ARGENTINA” (2019) RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA , 125(2). doi:10.13130/2039-4942/11788.