Nondestructive readout of holograms recorded by Bessel beam technique in LiNbO3:Fe and LiNbO3:Fe:Cu crystalsAnahit Badalyan, Ruben Hovsepyan, Paytsar Mantashyan, Vahram Mekhitaryan and Rafael DrampyanEur. Phys. J. D, 68 4 (2014) 82DOI: https://doi.org/10.1140/epjd/e2014-40356-8