@article{MZM_1980_27_3_a0,
     author = {S. S. Marchenkov},
     title = {A superposition basis in the class of {Kal'mar} elementary functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {321--332},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_3_a0/}
}