@article{DAN_1990_312_6_a14,
     author = {N. P. Konstantinova and A. A. Poplavskii},
     title = {Magnitude estimation via the interval of longitudinal wave},
     journal = {Doklady Akademii Nauk},
     pages = {1344--1347},
     publisher = {mathdoc},
     volume = {312},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_312_6_a14/}
}