Siagian, R. C., A. Nurahman, G. H. D. Sinaga, R. Ariefka, and P. Pribadi. “Exploring Celestial Object Characteristics: An In-Depth Analysis of Quasars, Stars, and White Dwarfs Using the Sloan Digital Sky Survey (SDSS) Dataset”. TIME in Physics, vol. 2, no. 1, Feb. 2024, pp. 1-16, doi:10.11594/timeinphys.2024.v2i1p1-16.