@article{VNGU_2014_14_2_a0,
     author = {P. E. Alaev},
     title = {On {Sums} of {Computable} {Ordinals}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {3--8},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2014_14_2_a0/}
}