@article{AL_2009_48_1_a1,
     author = {I. Sh. Kalimullin and V. G. Puzarenko},
     title = {Reducibility on families},
     journal = {Algebra i logika},
     pages = {31--53},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2009_48_1_a1/}
}