H. A. Sultan, C. A. Emshary, and Qusay M. A. Hassan, “Investigating the Nonlinear Optical Response of Pepper Oil under Low Power Irradiation with Continuous Wave Visible Laser Beam”, UTJsci, vol. 7, no. 2, pp. 131–138, Dec. 2020, doi: 10.32792/utq/utjsci/v7i2.730.