Intrinsic and magnetic impurity induced 'ANTPOT.19 F' nuclear magnetic relaxation in the superionic 'K IND.0.4' 'BI IND.0.6' 'F IND.2.2' - Donoso, José Pedro; Oliveira, Luiz Nunes de; Panepucci, Horácio Carlos; Cassanho, A; Guggenheim, H (Journal of Physics C, 1986)