@article{DAN_1985_281_6_a5,
     author = {I. A. Kipriyanov and L. A. Ivanov},
     title = {The {Huygens} principle for some equations in a symmetric space},
     journal = {Doklady Akademii Nauk},
     pages = {1310--1313},
     publisher = {mathdoc},
     volume = {281},
     number = {6},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_281_6_a5/}
}