Effects of barium on stimulus-induced changes in (K+)o and field potentials in dentate gyrus and area CA1 of human epileptic hippocampus. - Gabriel,S.; Kivi,A.; Kovács,R.; Lehmann,T-N.; Lanksch,W.R.; Meencke,H.J.; Heinemann,U. (Neurosci Lett, 1998)