Berli AU, Dahlan D, Umar AA. Pengaruh Lama Penumbuhan Titanium Dioksida Didoping Copper Terhadap Energi Gap. J. Ilmu Fis. [Internet]. 2017 Jan. 26 [cited 2024 May 2];8(2):60-3. Available from: http://jif.fmipa.unand.ac.id/index.php/jif/article/view/151