@article{FPM_2008_14_6_a5,
     author = {V. A. Koshelev},
     title = {Almost empty hexagons},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {91--120},
     publisher = {mathdoc},
     volume = {14},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2008_14_6_a5/}
}