Froese, Rainer, and Daniel Pauly, eds. (2009). "Chimaeriformes" in FishBase. January 2009 version.
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Tozer, H., & D. D. Dagit (2004). Husbandry of Spotted Ratfish, Hydrolagus colliei.[தொடர்பிழந்த இணைப்பு], Chapter 33 in: Smith, M., D. Warmolts, D. Thoney, & R. Hueter (editors). Elasmobranch Husbandry Manual: Captive Care of Sharks, Rays, and their Relatives. Ohio Biological Survey, Inc.
Tozer, H., & D. D. Dagit (2004). Husbandry of Spotted Ratfish, Hydrolagus colliei.[தொடர்பிழந்த இணைப்பு], Chapter 33 in: Smith, M., D. Warmolts, D. Thoney, & R. Hueter (editors). Elasmobranch Husbandry Manual: Captive Care of Sharks, Rays, and their Relatives. Ohio Biological Survey, Inc.
