@article{JMAG_2009_5_3_a2,
     author = {V. A. Zolotarev},
     title = {On commutative systems of nonselfadjoint unbounded linear operators},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {275--295},
     year = {2009},
     volume = {5},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2009_5_3_a2/}
}