@article{UFA_2015_7_2_a8,
     author = {V. I. Mogilevskii},
     title = {On spectral and pseudospectral functions of first-order symmetric systems},
     journal = {Ufa mathematical journal},
     pages = {115--136},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2015_7_2_a8/}
}