Situmorang AS, Sinaga JAB, Rintaningrum R, Siagian RC. Non-Linear Force Dynamics in Black Hole Accretion Disks Using Logarithmic and Trigonometric Approximations . jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2025 Feb. 28 [cited 2025 May 31];11(2):988-1000. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/10291