@article{SM_2004_195_11_a3,
     author = {E. A. Kalita},
     title = {Singular solutions of higher-order non-linear elliptic systems},
     journal = {Sbornik. Mathematics},
     pages = {1607--1638},
     publisher = {mathdoc},
     volume = {195},
     number = {11},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_11_a3/}
}