D R Curtis et al.
Brain research, 422(1), 192-195 (1987-09-29)
Divalent metal cations, including zinc, cadmium, cobalt, nickel, strontium, manganese, magnesium and calcium, reduced the depolarization by microelectrophoretic gamma-aminobutyric acid (GABA) and piperidine-4-sulphonic acid of the central terminations of muscle group Ia primary afferent fibres in the cat spinal cord