Hebebrand, J. & Friedl, W. & Reichelt, R. & Schmitz, E. & Moller, P. & Propping, P. (1988)
The shark GABA-benzodiazepine receptor: further evidence for a not so late phylogenetic appearance of the benzodiazepine.
Brain Research, 446(2), 251–261 DOI: 10.1016/0006-8993(88)90884-0