Stehmann, M. (1970)
Vergleichend morphologische und anatomische Untersuchungen zur Neuordnung der Systematik der nordostatlantischen Rajidae (Chondrichthyes, Batoidei). Archiv für Fischereiwissenschaft, 21(2), 73–164

Stehmann, M. & Bürkel, D.L. (1984)
General remarks, explanation of terms and mode of presentation for Hypotremata, Pristidae, Torpedinidae, Rajidae, Chimaeridae, Rhinochimaeridae In Whitehead, P.J.P., Bauchot, M.–L., Hureau, J.C., Nielsen, J. & E. Tortonese (Eds.), Fishes of the North–Eastern Atlantic and the Mediterranean. Vol. 1. (pp. 151–155, 159–196, 212–218). Unesco, Paris

Lloris, D. (1986)
Ictiofauna demersal y aspectos biogeográficos de la costa Sudoccidental de Africa (SWA/NAMIBIA). Monografías de zoología marina, Instituto de Ciencias del Mar, Barcelona, Consejo Superior de Investigaciones Científicas, 1: 429pp

McEachran, J.D. & Miyake, T. (1986)
Interrelationships within a putative monophyletic groups of skates (Chondrichthyes, Rajoidei, Rajini). In Uyeno, T. & Arai, R. & Taniuchi, T. & Matsuura, K. (Eds) Proceedings of the second international conference on Indo-Pacific fishes. Ichthyological Society of Japan, Tokyo: 281–290

Bauchot, M.-L. (1987)
Requins, Raies et autres Batoides, Chimeres in: Fischer W., Schneider M & M.–L. Bauchot(eds.): Fiches FAO d'identification des especes pour les besoins de la peche.(Revision l). Mediterranee et Mer Noire. Zone de peche 37. Vol. 2 Vertebres. Rome, CEE, FAO:: 767–890

Compagno, L.J.V. & Ebert, D.A. & Smale, M.J. (1989)
Guide to the sharks and rays of Southern Africa. New Holland Ltd., London 1989

Compagno, L.J.V. & Ebert, D.A. & Cowley, P.D. (1991)
Distribution of offshore demersal cartilaginous fishes (Class Chondrichthyes) of the west coast of southern Africa, with notes on their systematics. South African Journal of Marine Science, 11(1), 43–139
DOI: 10.2989/025776191784287664

Deynat, P.P. & Séret, B. (1996)
Le revêtement cutané des raies (Chondrichthyes, Elasmobranchii, Batoidea). I- Morphologie et arrangement des denticules cutanés. Annales des Sciences Naturelles – Zoologie et Biologie Animale, 17(2), 65–83

Lanfranco, G.G. (1996)
The fish around Malta (Central Mediterranean). Progress Press Co. Ltd.(Malta). 132 p.

McEachran, J.D. & Konstantinou, H. (1996)
Survey of the variation of alar and malar thorns in skates: phylogenetic implications (Chondrichthyes: Rajoidei). Journal of Morphology, 228(2), 165–178
DOI: 10.1002/(SICI)1097-4687(199605)228:2<165::AID-JMOR5>3.0.CO;2-4

Deynat, P.P. (1998)
Le revêtement cutané des raies (Chondrichthyes, Elasmobranchii, Batoidea). II. Morphologie et arrangement des tubercules cutanés. Annales des Sciences Naturelles – Zoologie et Biologie Animale, 19(3–4), 155–172
DOI: 10.1016/S0003-4339(99)80004-5

Borges, T.C. & Costa, E. & Cristo, M. & Erzini, K. & Malaquias, A. & Nortista, P. & Olim, S. & Pais, C. & Sendão, J. & Campos, A. & Fonseca, P. & Santos, J. & Larsen, R. & Eide, A. & Broadhurst, M. (2002)
Managing By-Catch and Discards: A Multidisciplinary Approach ("Bydiscard"). Study Project No.99/058 Final Report to the European Commission Directorate General Fisheries 2002

Relini, G. & Mannini, A. & Piano, T. (2003)
Annotated checklist of the skates (Chondrichthyes, Rajidae) in the Northern Ligurian Sea. Biologia Marina Mediterranea, 10(2), 882–885

Farrag, M.M.S. & El-Naggar, H.A. & Abou-Mahmoud, M.M.A. & Alabssawy, A.N. & Ahmed, H.O. & Abo-Taleb, H.A. & Kostas, K. (2019)
Marine biodiversity patterns off Alexandria area, southeastern Mediterranean Sea, Egypt. Environmental Monitoring and Assessment, 191(6), 367
DOI: 10.1007/s10661-019-7471-7