@article{MMO_1971_25_a1,
     author = {Z. I. Leǐbenzon},
     title = {Spectral resolutions of transformations of systems of boundary value problems},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {15--58},
     publisher = {mathdoc},
     volume = {25},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1971_25_a1/}
}