Spitzer, Frank. Principles of random walk / Frank Spitzer. - New Jersey : D. Van Nostrand, c 1964. - xi, 406 p. ; 24 cm. Includes index. Bibliography : p. 394-400. 330 330 Subjects--Topical Terms: Random walks (Mathematics).Stochastic processes. Dewey Class. No.: 519.282 / S49p