@article{FPM_1999_5_4_a13,
     author = {A. A. Shakirov},
     title = {On logical description of geometric figures},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {1191--1197},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1999_5_4_a13/}
}