A. M. Alshehri, El Sayed Yousefa, A. A. Alshahrani, A. Ibrahim, N. Ahmad, V. R. Bhardwaj, “Differential nonlinear absorption of an elliptically polarized femtosecond vortex beam in tellurite glass”, Optics and Spectroscopy, 128:8 (2020), 1178; Optics and Spectroscopy, 128:8 (2020), 1205–1210
