Low mass-specific brain Na+/K+-ATPase activity in elasmobranch compared to teleost fishes: implications for the large brain size of elasmobranchs.
G E Nilsson, M H Routley, and G M Renshaw
Proc Biol Sci. 2000 July 7; 267(1450): 1335–1339. PMCID: PMC1690671