Marco Tosato Ken Yoshida Egon Toft Vitas Nekrasas Johannes J. Struijk Closed-loop control of the heart rate by electrical stimulation of the vagus nerve. 161-169 2006 44 Med. Biol. Engineering and Computing 3 http://dx.doi.org/10.1007/s11517-006-0037-1 db/journals/mbec/mbec44.html#TosatoYTNS06