Yonggi Kim(Department of High and Applied Mathematics, Odessa National Maritime University/University Observatory, Chungbuk National University/Institute for Basic Science Research, Chungbuk National University/Vihorat Observatory)
Joh-Na Yoon(University Observatory, Chungbuk National University)
Ivan L. Andronov(Department of High and Applied Mathematics, Odessa National Maritime University)
Vitalii V.Breus(Department of High and Applied Mathematics, Odessa National Maritime University)
P. Dubovsky(Vihorat Observatory)
Lidia L.Chinarova(Astronomical Observatory, Odessa National University)
Wonyong Han(Korea Astronomy Observatory and Space Science Institute)