Stochastic control theory and stochastic differential systems : PROSEEDINGS OF A WORKSHOP OF THE "SONDERFORSCHUNGSBEREICH 72 DER DEUTSCHEN FORSCHUNGSGEMEINSCHAFT AN DER UNIVERSITAET BONN" WICH TOOK PLACE IN JANUARY 1979 AT BAD HONNEF - Kohlmann, M.; Vogel, W. (Springer Verlag, 1979)