@article{MT_2005_8_2_a2,
     author = {V. N. Berestovskii},
     title = {Spiral {Dispositions} of {Nonnegative} {Integers} at {Lattice} {Points}},
     journal = {Matemati\v{c}eskie trudy},
     pages = {49--68},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2005_8_2_a2/}
}