Experimental Evidence of an Optical Bistability Based on Self - Focusing. University of Thi-Qar Journal of Science, [S. l.], v. 3, n. 2, p. 190–193, 2012. Disponível em: https://jsci.utq.edu.iq/index.php/main/article/view/428.. Acesso em: 7 may. 2024.