1. The structure of the Weberian apparatus in the Siluri.;Alexander;Proceedings of the Zoological Society of London,1964
2. Structure and function in the catfish.;Alexander;Journal of Zoology,1965
3. Description of the primitive family Diplomystidae (Siluriformes, Teleostei, Pisces): morphology, taxonomy and phylogenetic implications.;Arratia;Bonner Zoologische Monographien,1987
4. Development and diversity of the suspensorium of trichomycterids and comparison with loricarioids (Teleostei: Siluriformes).;Arratia;Journal of Morphology,1990
5. New catfish of the genus Trichomyckrus from the high Andes of South America (Pisces, Siluriformes) with remarks on distribution and ecology.;Arratia;Zoologische Jahrbuch Systematic;,1984