Structure of luminescent mono and di-urethanesil nanocomposites doped with Eu3+ ions (vol 199, pg 117, 2003) - Dahmouche, K.; Goncalves, M. C.; Santilli, C. V.; Bermudez, V. D.; Carlos, L. D.; Craievich, A. F. (Elsevier B.V., 2003)