Spontaneous emission spectrum and level splitting of a three-level Λ-type atom in a damped cavity X. Q. Jiang, Y. L. Wang and X. D. Sun Eur. Phys. J. D, 57 3 (2010) 427-430 Published online: 16 February 2010 DOI: 10.1140/epjd/e2010-00033-8