Two-photon E1M1 and E1E2 transitions between 2p and 1s levels in hydrogen L. Labzowsky, D. Solovyev, G. Plunien and G. Soff Eur. Phys. J. D, 37 3 (2006) 335-343 Published online: 31 January 2006 DOI: 10.1140/epjd/e2006-00022-6