Morfologia, sistematica y distribucion del genero Plectostylus Beck, 1837 (Pulmonata: Bulimulidae)Published in Gayana Zoologia, in 1988, in volume 52, pages 115-195
The American genera of Asilidae (Diptera): keys for identification with an atlas of female spermathecae and other morphological details. 2. Key to the genera of Dasypogoninae Macquart, with descriptions of new genera and species and new synonymiesPublished in Gayana Zoologia, in 1988, in volume 52, pages 199-260
Revisión de métodos para estudios taxonómicos de rayas (Rajiformes, Rajidae)Published in Gayana, Zool., in 1988, in volume 52, issue 1-2, pages 15-93