Optical properties of modified YAB single crystals : Y1-xLnx(Al1-yGay)3(BO3)4 N. VIEGAS, B. TEISSEIRE, G. AKA, A. KAHN-HARADI and D. VIVIEN J. Phys. IV France, 04 C4 (1994) C4-357-C4-360 DOI: 10.1051/jp4:1994485