HAKOBYAN, T.L. ON THE $P_1$ PROPERTY OF SEQUENCES OF POSITIVE INTEGERS. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 50, n. 2 (240), p. 22–27, 2016. DOI: 10.46991/PSYU:A/2016.50.2.022. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol50_no2_2016_pp022-027. Acesso em: 17 may. 2024.