@article{TRSPY_1989_187_a4,
     author = {M. L. Gol'dman},
     title = {On traces with restrictions on spectrum},
     journal = {Informatics and Automation},
     pages = {69--77},
     publisher = {mathdoc},
     volume = {187},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1989_187_a4/}
}