@article{TRSPY_2015_290_a7,
     author = {V. L. Popov},
     title = {Number of components of the nullcone},
     journal = {Informatics and Automation},
     pages = {95--101},
     publisher = {mathdoc},
     volume = {290},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2015_290_a7/}
}