New approach to select reference stars for astrometric reduction of CCD-frames. - Vadym E. Savanevych; Eugene Dikov; Alexsander Bryukhovetskyi; Vladimir Vlasenko; Volodymyr Akhmetov; Sergii V. Khlamov; Vladislav Khramtsov; Iana Movsesian (CSIT (2), 2019)