Edgar, Gerald A., 1949-. Stopping times and directed processes / by G. A. Edgar and Louis Sucheston. - Cambridge : Cambridge University Press, 1992. - 428 p. : ill. ; 25 cm. - Encyclopedia of mathematics and its applications ; v.47 . ISBN: 0521350239 Subjects--Topical Terms: Convergence.Probabilities.Martingales (Mathematics).