Ross, Sheldon M. Introduction to probability models / by Sheldon M. Ross. - 9th ed / . - Philadelphia : Elsevier , 2007. - xi, 782p. : ills. ; 23cm . Includes index ISBN: 9780125980623 RS450.00 Subjects--Index Terms: APPLIED MATHEMATICS Dewey Class. No.: 519.2 / ROS/I