@article{SM_2020_211_9_a2,
     author = {M. Ya. Mazalov},
     title = {A~criterion for uniform approximability of individual functions by solutions of second-order homogeneous elliptic equations with constant complex coefficients},
     journal = {Sbornik. Mathematics},
     pages = {1267--1309},
     publisher = {mathdoc},
     volume = {211},
     number = {9},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2020_211_9_a2/}
}