Li, Honglan Dual-mode blue emission, enhanced up-conversion luminescence and paramagnetic properties of ytterbium and thulium-doped Ba [electronic resource] - Journal of colloid and interface science Sep 2017 - 215-221 p. digital Publication Type: Journal Article ISSN: 1095-7103 Standard No.: 10.1016/j.jcis.2017.04.066 doi