Introduction to the theory of random processes /
Gikhman, Iosif Il'ich.
Skorokhod, A. V.(Anatoliĭ Vladimirovich),1930-
Philadelphia London Saunders
1969
Originally published as 'Vvedenie v teoriiu sluchainykh protsessov'. Moscow: Nauka P., 1965
bibl p503-509
Stochastic processes.