A Spectroscopic Analysis of Blue and Ultraviolet Upconverted Emissions from Gd<sub>3</sub>Ga<sub>5</sub>O<sub>12</sub>:Tm<sup>3+</sup>, Yb<sup>3+</sup> NanocrystalsFabiano Pandozzi, Marco Bettinelli, Rafik Naccache et al.|The Journal of Physical Chemistry B|2005Cited by 190