EPR and Optical Studies of Cr (III) Ions Doped NaCaAlPO F Nano Phosphor 4 3. International Journal of Current Engineering and Technology, [S. l.], v. 1, n. 2.Special Issue, p. 259–264, 2014. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/3648. Acesso em: 30 apr. 2026.