wartono, wartono, and Irma Suryani. “The Solution of Nonlinear Parabolic Equation Using Variational Iteration Method”. Jurnal Matematika, Statistika dan Komputasi 16, no. 3 (April 28, 2020): 287-295. Accessed April 25, 2024. https://journal.unhas.ac.id/index.php/jmsk/article/view/8468.