TY - JOUR AU - A. I. Stukachev TI - Processes and structures on approximation spaces JO - Algebra i logika PY - 2017 SP - 93 EP - 109 VL - 56 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_2017_56_1_a3/ LA - ru ID - AL_2017_56_1_a3 ER -