@article{MMO_1967_16_a0,
     author = {M. S. Agranovi\v{c}},
     title = {Positive boundary value problems for certain first order systems},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {3--24},
     publisher = {mathdoc},
     volume = {16},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1967_16_a0/}
}