Kothari D, Nagrath L, . (2010). Electric machines 4 th ed. New Delhi: Mc Graw Hill Education Pvt. Ltd.
Kothari D, Nagrath L, . 2010. Electric machines 4 th ed. New Delhi: Mc Graw Hill Education Pvt. Ltd.
Kothari D, Nagrath L, . Electric machines 4 th ed. New Delhi: Mc Graw Hill Education Pvt. Ltd. 2010.