@article{MZM_1968_4_4_a5,
     author = {N. A. Ivanova},
     title = {Fundamental solutions of linear elliptic equations containing a small parameter},
     journal = {Matemati\v{c}eskie zametki},
     pages = {425--434},
     publisher = {mathdoc},
     volume = {4},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_4_a5/}
}