Abdullah, O. G., D. A. Tahir, and D. R. Saber. “Optical Properties of the Synthesized Cr2S3 Nanoparticles Embedded in Polyvinyl Alcohol”. ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, Vol. 3, no. 1, May 2015, pp. 45-49, doi:10.14500/aro.10067.