@article{DAN_1986_288_3_a13,
     author = {V. P. Radchenko and Yu. P. Samarin and S. M. Khrenov},
     title = {Determining equations for the materials in the
},
     journal = {Doklady Akademii Nauk},
     pages = {571--574},
     publisher = {mathdoc},
     volume = {288},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_288_3_a13/}
}