@article{DAN_1964_157_6_a20,
     author = {M. P. Volarovich and A. I. Levykin and N. E. Galdin},
     title = {Speeds of longitudinal waves in rock samples at pressures of up to 20 000 kg/cm$^2$},
     journal = {Doklady Akademii Nauk},
     pages = {1349--1351},
     publisher = {mathdoc},
     volume = {157},
     number = {6},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_6_a20/}
}