@article{DAN_1973_212_1_a20,
     author = {V. Z. Ryaboy},
     title = {Anomalies of the $P^{\mathrm{M}}_{\text{ref}}(P_n)$ wave travel times and velocity inhomogeneities
},
     journal = {Doklady Akademii Nauk},
     pages = {88--91},
     publisher = {mathdoc},
     volume = {212},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_1_a20/}
}