1. N. Yuningsih, H. Kunlestiowati, and S. Sardjito, Prosiding Seminar Nasional Fisika (E-JOURNAL) 8, (2019). doi: https://doi.org/10.21009/03.SNF2019.02.PA.06
2. F. A. Godínez, M. Navarrete, O. A. Chávez, A. Merlin, and J. R. Valdés, Progr. Fract. Differ. Appl. 1 (2), pp. 133–143 (2015). doi: http://10.12785/pfda/010207
3. I. Widyastuti, J. Ris. dan Kaji. Pendidik. Fis 6 (2), pp. 1–6 (2019). doi: http://10.12928/jrkpf.vxix.xxxx
4. G. Virny, J. Mat. UNAND 7 (2), pp. 98–104 (2018).
5. Newton’s law of heating and the heat equation