@article{DE_2000_36_4_a9,
     author = {I. A. Bikchantaev},
     title = {The {Hilbert} problem for first-order linear elliptic systems on a {Riemann} surface with boundary},
     journal = {Differencialʹnye uravneni\^a},
     pages = {500--507},
     year = {2000},
     volume = {36},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_4_a9/}
}