@article{AL_2011_50_4_a3,
     author = {M. V. Zubkov},
     title = {Strongly $\eta$-representable degrees and limitwise monotonic functions},
     journal = {Algebra i logika},
     pages = {504--520},
     publisher = {mathdoc},
     volume = {50},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2011_50_4_a3/}
}