@article{RM_1980_35_2_a13,
     author = {L. V. Levantovskii},
     title = {The boundary of a~set of stable matrices},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {249--250},
     publisher = {mathdoc},
     volume = {35},
     number = {2},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_2_a13/}
}