I.T.Abed-Ali and C.A.Emshary (2019) “Determination of nonlinear refractive index of paprika oil and pepper oil under cw visible laser illumination ”, University of Thi-Qar Journal, 12(3), pp. 90–101. Available at: https://www.jutq.utq.edu.iq/index.php/main/article/view/103 (Accessed: 3 October 2025).