Lawler, Gregor F. Random walk : a modern introduction / - New York: Cambridge University Press, 2010 - xii, 364 p. Bibl. Index - Cambridge studies in advanced mathematics ; 123 . "Purchased under NBHM grant for the year 2011-2012" ISBN: 9780521519182 Dewey Class. No.: 519.282 / L418.RW