@article{DAN_1989_306_6_a9,
     author = {S. N. Makarov},
     title = {Determination of the mean parameters of sound in the {Earnshaw} problem at the stage of the saw-toothed wave},
     journal = {Doklady Akademii Nauk},
     pages = {1325--1327},
     publisher = {mathdoc},
     volume = {306},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_306_6_a9/}
}