ABRAMIAN, M. G.; HARUTYUNIAN, S. V. ABOUT THE MARGINAL IN STABILITY OF SELFGRAVITATING RING. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 34, n. 2 (193), p. 47–51, 2000. DOI: 10.46991/PYSUA.2000.34.2.047. Disponível em: https://journals.ysu.am/proceedings-phys-math/article/view/vol34_no2_2000_pp047-051. Acesso em: 12 jun. 2026.