@article{DAN_1963_152_6_a14,
     author = {L. D. \`Eskin},
     title = {The $\zeta$-function on the group of unitary matrices},
     journal = {Doklady Akademii Nauk},
     pages = {1327--1328},
     publisher = {mathdoc},
     volume = {152},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_152_6_a14/}
}