@article{SM_1977_33_1_a1,
     author = {V. A. Gritsenko},
     title = {Symmetric squares of zeta-functions for the principal congruence subgroup of the {Siegel} group of genus~2},
     journal = {Sbornik. Mathematics},
     pages = {19--36},
     year = {1977},
     volume = {33},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1977_33_1_a1/}
}