1. Agassiz L (1833–1844) Recherches sur les poissons fossiles. Petitpierre, Nauchâtel, p 1420
2. Altermatt RU (1991) Zur Kopfanatomie des Schnepfenfisches Macroramphosus scolopax (Linnaeus, 1758) (Teleostei, Syngnathiformes). Eine beschreibend-morphologische Studie unter Berucksichtigung funktioneller Aspekte. Unpublished dissertation, Universität Basel, p 117
3. Aubry M-P, Ouda K, Dupuis C, Berggren WA, Van Couvering JA, Ali J, Brinkhuis H, Gingerich PR, Heilmann-Clausen C, Hooker J, Kent DV, King C, Knox RW, O’B LP, Molina E, Schmitz B, Steurbaut E, Ward DR (2007) The Global Standard Stratotype-section and Point (GSSP) for the base of the Eocene Series in the Dababyia section (Egypt). Episodes 30:271–286
4. Baciu D-S, Bannikov AF, Tyler JC (2005) Revision of the fossil fishes of the family Zeidae (Zeiformes). Boll Mus Civ St Nat Verona, Geol Paleont Preist 29:95–128
5. Banister KE (1967) The anatomy and classification of the order Gasterosteiformes. Unpublished dissertation, University of Newcastle upon Tyne, p 422