Khamis, M., and Z. Q. . AlAbbasi. “Designing a W-Type Index Praseodymium-Doped Chalcogenide Fiber for Strongly-Efficient MIR Laser Beyond 4 μm”. International Journal of Electrical and Computer Engineering Systems, vol. 13, no. 10, Dec. 2022, pp. 859-65, doi:10.32985/ijeces.13.10.3.