Aprilia, Aprilia, Hakim Luthfi Malasan, Geavani Eva Ramadhania, Agus Triono Puri Jatmiko, Mochamad Irfan, Dhimaz Gilang Ramadhan, Ade Nur Istiqomah, and Evan Irawan Akbar. 2019. “B-Emission Stars in Southern Sky Observed in Bosscha Observatory: Spectroscopic Study of Hα Spectral Line Variability”. Journal of Mathematical and Fundamental Sciences 51 (3):243-51. https://doi.org/10.5614/j.math.fund.sci.2019.51.3.3.