@article{DM_2010_22_1_a1,
     author = {S. S. Marchenkov},
     title = {On the complexity of the $\mathscr E^2$ {Grzegorczyk} class},
     journal = {Diskretnaya Matematika},
     pages = {5--16},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2010_22_1_a1/}
}