Selective stimulation of sacral nerve roots for bladder control: A study by computer modeling. - Nico J. M. Rijkhoff; Jan Holsheimer; Evert L. Koldewijn; Johannes J. Struijk; Philip E. V. van Kerrebroeck; Frans M. J. Debruyne; Hessel Wijkstra (IEEE Trans. Biomed. Eng., 1994)