@article{TIMM_2009_15_1_a12,
     author = {V. A. Koshcheev},
     title = {Fundamental groups of spaces of generalized perfect splines},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {159--165},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2009_15_1_a12/}
}