Kotvytska, L. A., Department of Low-Temperature Physics, V.N. Karazin Kharkiv National University, Svobody sq. 4, 61022 Kharkiv, Ukraine, Ukraine

• Journal of V. N. Karazin Kharkiv National University. Series Physics No. 30 (2019): Journal of V.N. Karazin Kharkiv National University, series "Physics" - Articles
  The number of images of a point source in an N-point gravitational lens
  Abstract  PDF