@article{DE_1976_12_6_a2,
     author = {G. I. Kabak and Yu. K. Lando},
     title = {The minimal {Green's} matrix of a multi-valued differential operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {978--982},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_6_a2/}
}