P.  GNASPINI, ?A new cavernicolous Ptomaphagus (Coleoptera, Cholevidae) from Argentina?, GIen, vol. 5, pp. 391-395., 1991.

P.  GNASPINI, ?Notas sobre los escarabajos cavernicolas sudamericanos de la familia Cholevidae (Coleoptera)?, Spelaion, vol. 4, pp. 5-8., 1993.

P.  GNASPINI, ?Brazilian Cholevidae (Coleoptera), with emphasis on cavernicolous species. II. Subgenus Iutururuca nov., subgenus of Adelopsis?, ASef pttts (n. s.), vol. 29, pp. 77-87., 1993.

P.  GNASPINI, ?Brazilian Cholevidae (Coleoptera) with emphasis on cavernicolous species IV. Adelopsis (Iutururuca) Biology and description of larvae?, MBsp, vol. 20, pp. 91-99., 1993.

P.  GNASPINI, ?Brazilian Cholevidae (Coleoptera) with emphasis on cavernicolous species III. Dissochaetus larvae, with description of new feature?, Revista brasileira de Entomologia, vol. 37, pp. 545-553., 1993.

S. B.  PECK, GNASPINI, P., and Newton, A. F., ?Catalogue and genereric keys for the Leiodidae of Mexico, West Indies, and central and south America (Insecta: Coleoptera)?, GIen, vol. 9, pp. 37-72., 1998.

P.  GNASPINI, ?Subterranean evolution and phylogenetic relationships within the tribe Ptomaphagini (Coleoptera, Leiodidae, Cholevinae), in: Phylogeny and evolution of subterranean and endogean Cholevidae (=Leiodidae Cholevinae), proceedings of XX international congress ?, AMrt, pp. 227-234., 1998.