@article{SM_2002_193_2_a2,
     author = {I. K. Lifanov and L. N. Poltavskii},
     title = {Pseudodifference operators and uniform convergence of
},
     journal = {Sbornik. Mathematics},
     pages = {205--230},
     publisher = {mathdoc},
     volume = {193},
     number = {2},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_2_a2/}
}