Literature
- Albuquerque, R. M. 1954-1956. Peixes de Portugal e ilhas adjacentes. Chavas para a sua determinação. Port. Acta biol., ser. B, 5: xvi+1167 pp., 445 fig.
- Andriashev, A. P. 1964b. Fishes of the Northern Seas of the USSR. Jerusalem, IPST, 617 p., 300 fig. (Translated from: Ryby severnykh morei SSSR. Izv. Akad. Nauk SSSR, Moskwa-Leningrad, 1954.).
- Bigelow, H. B.; Schroeder, W. C. 1953a. Fishes of the western North Atlantic. Sawfishes, Guitarfishes, Skates and Rays; Chimaeroids. Mem. Sears Found. Mar. Res., New Haven, 1(2): xv+588 p., 127 fig.
- Clark, R. S. 1926. Rays and Skates, a revision of the european species. Fisheries, Scotland, Scient. Invest., (1) :1-66, fig. 1-42, pl. 1-36.
- Clark, R. S. 1929-1932. Selachii, Raiidae. In: L. Joubin, ed., Faune ichthyol. Atl. N., CIEM, Copenhagen: fiches 34bis-57.
- Couch, J. 1862-1865. The History of the Fishes of the British Islands, London, 1, 1862: vii+245 pp., fig., pl. 1-57; 2, 1863: 265 pp., 63 pl.; 3, 1864: 208 pp., 48 pl.; 4, 1865: iv+439 pp., 73 pl.
- Day, F. 1880-1884. The Fishes of Great Britain and Ireland. London-Edinburgh, 2 vol., cxii+336 pp., 5 +7 fig., 92 pl. and 388 pp., 87 pl. 1880: 1(1): pp. 1-64, pl. I-XXVII; 1881: 1(2) (3): pp. 65-240, pl. XXVIII-LXVIII; 1882: 1(4): pp. 241-336, pl. LXIX-XCII; 2 (5): pp. 1-96, pl. XCIII-CXVI; 1883: 2 (6): pp. 97-176, pl. CXVII-CXXXII; 2 (7): pp. 177-272, pl. CXXXIII-CXLVIII; 1884: 2 (8): pp. 273-368, pl. CXLIX-CLXXIX.
- Donovan, E. 1802-1808. The Natural History of British Fishes including scientific and general descriptions of the most interesting species, and an extensive selcction of accurately finished coloured plates, London. 1, 1802: [1-70], pl. I-XXIV; 2, 1903: [71-164], pl. XXV-XLVIII; 3, 1804: [165-300], pl. XLIX-LXXII; 4, 1806: [301-406], pl. LXXIII-XCVI; 5, 1808: [407-516], pl. XCVIICXX.
- Duméril, A. H. A. 1865. Histoire naturelle des poissons ou ichthyologie générale, Paris, 2 vol., 1: 720 p., Atlas: 14 pl.
- Ehrenbaum, E. 1927b. XII. Chondrostei. In: G. Grimpe & E. Wagler, Die Tierwelt der Nordund Ostsee, 9 (12): f3-f8, 4 fig.
- Günther, A. 1870. Catalogue of the fishes in the British Museum. 8. Catalogue of the Physostomi containing the families Gymnotidae, Symbranchidae, Muraenidae, Pegasidae and of the Lophobranchii, Plectognathi, Dipnoi, Ganoidei, Chondropterygii, Cyclostomata, Leptocardii in the collection of the British Museum. London, xxv+549 pp.
- Jenkins, J. T. 1925. The fishes of the British Isles both fresh water and salt. London: vii + 376 p., 143 pl.
- Leigh-Sharpe, W. H. 1924. The comparative morphology of the secondary sexual characters of elasmobranch fishes. The claspers, clasper siphons, and claspr glands. VII. J. Morph., 39 (2): 567-577, fig. 1-15.
- Lozano y Rey, L. 1928. Fauna Ibérica. Pesces (Generalidades, Ciclóstomos y Elasmobranquios). Mus. Nac. Ciencias Nat., Madrid, 1:1-692,197 fig., 20 pl.
- Moreau, E. 1881-1891. Histoire naturelle des poissons de la France, Paris, I, 1881: pp. I-VII+1-480, fig. 1-82; II, 1881: pp. 1-572, fig. 83-145; III, 1881: pp. 1-697, fig. 146-220; Suppl., 1891: pp. 1-144, fig. 221-227.
- Muller, J.; Henle, J. 1841. Systematische Beschreibung der Plagiostomen. Berlin, xxii+204 pp., 60 pl.
- Muus, B. J.; Dahlström, P. 1965. Meeresfische in Farben, 244 pp., 173 numb. and many unnumb. fig.
- Möbius, K.; Heincke, F. 1883. Die Fische der Ostsee in Bericht der Comission zur wissenschaftlichen Untersuchung der Deutschen Meere in Kiel. Berlin :1-206, fig., 1 map.
- Poll, M. 1947. Poissons marins in Faune de Belgique. Bruxelles, 452 pp., 267 fig., 2 pl., 2 maps n. num. (inset).
- Smitt, F. A. 1893-1895. (ed.) A history of Scandinavian fishes, Stockholm and Paris, Atlas, I, 1893, pl. i-xxvii.
- Stehmann, M. 1970. Vergleichend morphologische und anatomische Untersuchungen zur Neuordnung der Systematik der nordostatlantischen Rajidae (Chondrichthyes, Batoidei). Arch. FischWiss., 21(2): 73-163,1 fig., pl. 1-27.
- Wheeler, A. 1969. The Fishes of the British Isles and North-West Europe. Macmillan, London, Melbourne and Toronto: pp. i-xvii+1-163, 5+177 fig., 392 fig. (princ. sp.), 92 n. num. fig., 16 pl., maps.
- Williamson, H. C. 1913. On the eggs of certain skates (Raia). Scient. Invest. Fishery Bd Scotl., 1912 [.