Authors: Ramirez, JL Cevallos-Ferriz, SRS Silva-Pineda, A

Citation: Jl. Ramirez et al., Reconstruction of the leaves of two new species of Pseudosmodingium (anacardiaceae) from Oligocene strata of Puebla, Mexico, INT J PL SC, 161(3), 2000, pp. 509-519

Authors: Ramirez, JL Cevallos-Ferriz, SRS

Citation: Jl. Ramirez et Srs. Cevallos-ferriz, Leaves of salicaceae (Salix and Populus) from Oligocene sediments near Tepexi de Rodriguez, Puebla, Mexico, INT J PL SC, 161(3), 2000, pp. 521-534

Authors: de Leon, PV Cevallos-Ferriz, SRS

Citation: Pv. De Leon et Srs. Cevallos-ferriz, Leaves of Cercocarpus mixteca n. sp (Rosaceae) from Oligocene sediments, near Tepexi de Rodriguez, Puebla, REV PALAE P, 111(3-4), 2000, pp. 285-294

Authors: Ramirez, JL Cevallos-Ferriz, SRS

Citation: Jl. Ramirez et Srs. Cevallos-ferriz, Leaves of Berberidaceae (Berberis and Mahonia) from Oligocene sediments, near Tepexi de Rodriguez, Puebla., REV PALAE P, 110(3-4), 2000, pp. 247-257

Authors: Hernandez-Castillo, GR Cevallos-Ferriz, SRS

Citation: Gr. Hernandez-castillo et Srs. Cevallos-ferriz, Reproductive and vegetative organs with affinities to Haloragaceae from the Upper Cretaceous Huepac Chert Locality of Sonora, Mexico, AM J BOTANY, 86(12), 1999, pp. 1717-1734

Authors: Rodriguez-De La Rosa, RA Cevallos-Ferriz, SRS

Citation: Ra. Rodriguez-de La Rosa et Srs. Cevallos-ferriz, Vertebrates of the El Pelillal locality (Campanian, Cerro del Pueblo Formation), southeastern Coahuila, Mexico, J VERTEBR P, 18(4), 1998, pp. 751-764