@article{AL_2006_45_3_a3,
     author = {A. N. Frolov},
     title = {$\Delta_2^0${-Copies} of {Linear} {Orderings}},
     journal = {Algebra i logika},
     pages = {354--370},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2006_45_3_a3/}
}