@article{KUTGS_1997_23_a0,
     author = {A. P. Shirokov},
     title = {Preface},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {5--6},
     publisher = {mathdoc},
     volume = {23},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1997_23_a0/}
}