@article{DE_2000_36_2_a11,
     author = {L. I. Danilov},
     title = {Absolute continuity of the spectrum of a periodic {Dirac} operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {233--240},
     year = {2000},
     volume = {36},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_2_a11/}
}