Study of “forbidden” atomic transitions on D2 line using Rb nano-cell placed in external magnetic field G. Hakhumyan, C. Leroy, R. Mirzoyan, Y. Pashayan-Leroy and D. Sarkisyan Eur. Phys. J. D, 66 5 (2012) 119 Published online: 17 May 2012 DOI: 10.1140/epjd/e2012-20687-2