@article{AL_2017_56_1_a3,
     author = {A. I. Stukachev},
     title = {Processes and structures on approximation spaces},
     journal = {Algebra i logika},
     pages = {93--109},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2017_56_1_a3/}
}