@article{FPM_2000_6_2_a4,
     author = {V. V. Dontsov},
     title = {The~systoles of uniform lattices on a~three-dimensional {Heisenberg} group with {a~Carnot--Carath\'eodory} metric},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {401--432},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2000_6_2_a4/}
}