TY - JOUR AU - A. E. Pentus AU - M. R. Pentus TI - Complexity of the Lambek calculus with one division and a~negative-polarity modality for weakening JO - Fundamentalʹnaâ i prikladnaâ matematika PY - 2021 SP - 143 EP - 162 VL - 23 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FPM_2021_23_4_a8/ LA - ru ID - FPM_2021_23_4_a8 ER -