@article{SM_1992_72_2_a7,
     author = {\`E. \`E. Shnol'},
     title = {On approximation of curves by level curves of homogeneous polynomials, and on series in homogeneous polynomials},
     journal = {Sbornik. Mathematics},
     pages = {403--411},
     year = {1992},
     volume = {72},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_72_2_a7/}
}