@article{ZNSL_1999_261_a11,
     author = {A. I. Kurnosenko},
     title = {Inversive invariant of a pair of circles},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {167--186},
     publisher = {mathdoc},
     volume = {261},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_261_a11/}
}