Rao, T S Madhava Power system protection static relays: With microprocessor applications - 2nd ed. - New Delhi McGraw-Hill Education (India) 2015 - xv, 723 p. 2943 27/11/2017 HBD17/7108 05/12/2017 UIET (SFS) ISBN: RS570 Dewey Class. No.: 621.319 R18P(2)