@article{DAN_1989_308_5_a3,
     author = {A. F. Lavrik},
     title = {Closed triplicity of functional equations of zeta functions},
     journal = {Doklady Akademii Nauk},
     pages = {1044--1046},
     year = {1989},
     volume = {308},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_5_a3/}
}