Gd2O3:Eu phosphor particles with sphericity, submicron size and non-aggregation characteristics Kang, Y. C. ; Okuyama, K. ; Park, S. B. ; Lenggoro, I. W. Abstract Publication: Journal of Physics and Chemistry of Solids Pub Date: March 1999 DOI: 10.1016/S0022-3697(98)00266-2 Bibcode: 1999JPCS...60..379K