@article{UZERU_2010_2_a10,
     author = {V. G. Mirzoyan and S. N. Noreyan and K. M. Gevorgyan},
     title = {Determination of refractive index of heterogeneous substances for $X$--ray radiation},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {63--65},
     publisher = {mathdoc},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2010_2_a10/}
}