Bronza, S. D., Kotvytskiy, A. T. and Korostelov, Y. M. (2019) “The N-point gravitational lens as cover and his the profile cover”, Journal of V. N. Karazin Kharkiv National University. Series Physics, 0(31), pp. 48-53. doi: 10.26565/2222-5617-2019-31-7.