@article{DAN_1986_291_5_a19,
     author = {Yu. A. Dolgopolov},
     title = {The systematic errors of definition of the depth of underground communications
},
     journal = {Doklady Akademii Nauk},
     pages = {1104--1108},
     publisher = {mathdoc},
     volume = {291},
     number = {5},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_291_5_a19/}
}