PratsiovytyiM., GoncharenkoY., LysenkoI. and RatushniakS. 2023. Finite $A_2$-continued fractions in the problems of rational approximations of real numbers. Ukrains’kyi Matematychnyi Zhurnal. 75, 6 (Jun. 2023), 849 - 858. DOI:https://doi.org/10.37863/umzh.v75i6.7413.