@inproceedings{sgem2017s09085,
  title = {THE LEVEL SURFACE OF THE GENERALIZED PROBLEM OF TWO CENTERS},
  author = {Valentin Gushchin and Adam Khasanov},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Informatics, Geoinformatics and Remote Sensing},
  year = {2017},
  pages = {673-680},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/22/s09.085}
}