¹Simonia, I.,^2,3Gucsik, A.
Open Astronomy (Baltic Astronomy) 28, 1-12 Link to Article [DOI: 10.1515/astro-2019-0003]
¹School of Natural Sciences and Engineering, Ilia State University, Cholokashvili str., 3/5, Tbilisi, 0162, Georgia
²Department of Geology, University of Johannesburg, Johannesburg, South Africa
³Department of Nonlinear and Laser Optics, Wigner Research Institute for Physics, Hungarian Academy of Sciences, Budapest, Hungary

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