@article{ZNSL_2015_439_a5,
     author = {A. E. Guterman and O. V. Markova},
     title = {The realizability problem for values of the length function for quasi-commuting matrix pairs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {59--73},
     year = {2015},
     volume = {439},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2015_439_a5/}
}