@article{UZKU_2014_156_1_a2,
     author = {D. Kh. Zainetdinov and I. Sh. Kalimullin},
     title = {On limitwise monotonic reducibility of $\Sigma_2^0$-sets},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {22--30},
     publisher = {mathdoc},
     volume = {156},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2014_156_1_a2/}
}