@article{MZM_1969_5_5_a8,
     author = {S. S. Marchenkov},
     title = {Elimination of recursion schemas in the {Grzegorczyk} $\mathscr E^2$ class},
     journal = {Matemati\v{c}eskie zametki},
     pages = {561--568},
     publisher = {mathdoc},
     volume = {5},
     number = {5},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_5_a8/}
}