@article{IM2_2015_79_6_a5,
     author = {A. R. Mirotin},
     title = {On joint spectra of families of unbounded operators},
     journal = {Izvestiya. Mathematics},
     pages = {1235--1259},
     year = {2015},
     volume = {79},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2015_79_6_a5/}
}