@article{DAN_1970_191_2_a7,
     author = {M. K. Fage},
     title = {The sweep method},
     journal = {Doklady Akademii Nauk},
     pages = {286--289},
     year = {1970},
     volume = {191},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_2_a7/}
}