Isnaeni I, Purwandari V, Putro PA, Adiwidya HM. Optical Properties of Sodium-doped Carbon Dots Made of Urea and Trisodium Citrate. timeinphys [Internet]. 2023 Feb. 26 [cited 2024 Dec. 22];1(1):1-9. Available from: https://ejournal.universitasmandiri.ac.id/index.php/timeinphys/article/view/1