@article{DM_2006_18_4_a3,
     author = {S. A. Volkov},
     title = {An example of a~simple quasi-universal function in the class $\mathcal E^2$ of the {Grzegorczyk} hierarchy},
     journal = {Diskretnaya Matematika},
     pages = {31--44},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2006_18_4_a3/}
}