Effect of spontaneously generated coherence on the dynamics of a four level N-system Niharika Singh, Richard D’Souza, Quissen V. Lawande and Bhagawantrao Narasin Jagatap Eur. Phys. J. D, 67 7 (2013) 147 Published online: 18 July 2013 DOI: 10.1140/epjd/e2013-40280-5