@article{DAN_1976_231_1_a14,
     author = {S. D. Kogan},
     title = {Experimental hodograph of the $PcP$ wave},
     journal = {Doklady Akademii Nauk},
     pages = {61--63},
     year = {1976},
     volume = {231},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_1_a14/}
}