@article{SM_2001_192_8_a5,
     author = {M. M. Lekishvili and A. N. Danelia},
     title = {On deformation of certain functional classes in the~spaces $C(T^m)$ and~$L(T^m)$},
     journal = {Sbornik. Mathematics},
     pages = {1209--1224},
     publisher = {mathdoc},
     volume = {192},
     number = {8},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2001_192_8_a5/}
}