International Seminar on Mathematical Modelling and Stability of Stochastic Models.International Seminar on Mathematical Modelling and Stability of Stochastic Models(9th : 1985 : Bulgaria)：Stability problems for stochastic models : proceedings.Springer-Verlag,1987.
International Seminar on Mathematical Modelling and Stability of Stochastic Models(9th : 1985 : Bulgaria)：Stability problems for stochastic models : proceedings
International Seminar on Mathematical Modelling and Stability of Stochastic Models.Springer-Verlag,1987.
