2020. The Properties and Stability of Self-Gravitating, Polytropic Spheres with γ = 1 to 1.4 Specific Heat Ratios. Revista Mexicana de Astronomía y Astrofísica. 56, 1 (Apr. 2020), 55–62. DOI:https://doi.org/10.22201/ia.01851101p.2020.56.01.07.