Isnaeni, I., Purwandari, V., Putro, P. A. and Adiwidya, H. M. (2023) “Optical Properties of Sodium-doped Carbon Dots Made of Urea and Trisodium Citrate”, TIME in Physics, 1(1), pp. 1–9. doi: 10.11594/timeinphys.2023.v1i1p1-9.