Stochastic control theory and stochastic differential systems : proceedings of a workshop of the "Sonderforschungsbereich 72 der Deutschen Forschungsgemeinschaft an der Universitat Bonn" which took place January 1979 at Bad Honnef - Kohlmann, M. (Michael); Vogel, Walter, 1923 June 22- (Springer-Verlag, 1979)