@article{SM_1972_17_1_a4,
     author = {A. M. Leontovich},
     title = {Rate of convergence in the {\textquotedblleft}circle formation{\textquotedblright} problem},
     journal = {Sbornik. Mathematics},
     pages = {89--118},
     year = {1972},
     volume = {17},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_17_1_a4/}
}