@article{DA_2009_16_2_a3,
     author = {S. A. Volkov},
     title = {The class of {Skolem} elementary functions},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {42--60},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2009_16_2_a3/}
}