@article{FPM_2021_23_4_a8,
     author = {A. E. Pentus and M. R. Pentus},
     title = {Complexity of the {Lambek} calculus with one division and a~negative-polarity modality for weakening},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {143--162},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2021_23_4_a8/}
}