Spontaneously generated coherence in a Doppler broadened atomic system A.-J. Li, C.-L. Wang, L. Wang, J.-H. Wu and J.-Y. Gao Eur. Phys. J. D, 42 3 (2007) 373-379 Published online: 07 March 2007 DOI: 10.1140/epjd/e2007-00048-2