@article{SEMR_2005_2_a24,
     author = {E. A. Fominykh and M. A. Ovchinnikov},
     title = {On the complexity of graph-manifolds},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {190--191},
     publisher = {mathdoc},
     volume = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2005_2_a24/}
}