World Scientific series in 20th century physicsPaper 4.4: M.C. Downer, A. Bivas and N. Bloembergen, “Selection rule violation, anistropy and anomalous intensity of two-photon absorption lines in Gd 3+: LaF 3,” Optics Comm. 41, 335–340, 1982.Published Sep 1, 1996• 0 citationsPublisherDOI10.1142/9789812795793_0044