Moreira, L., Ponce Cabrera, Luis, De Posada, E., AND Flores, T.. "Er:Yag Polycrystalline Ceramics: Use of SiO2 and B2O3 as Sintering Additives and its Effects on the Optical and Structural Properties" Revista Cubana de FĂ­sica [Online], Volume 34 Number 2 (5 December 2017)