Optical and structural properties of rice husk silicate incorporated borotellurite glasses doped with erbium oxide nanoparticles. - Umar, S. A.; Halimah, M. K.; Chan, K. T.; Amirah, A. A.; Azlan, M. N.; Grema, L. U.; Hamza, A. M.; Ibrahim, G. G. (Journal of Materials Science: Materials in Electronics, 2019)