Synthesis optimization, structural evolution and optical properties of 'Y IND.0,9''Er IND.0,1''Al IND.3''(B'O IND.3') IND.4'nanopowders obtained by soft chemistry methods - Maia, Lauro J. Q.; Ferrari, C. R.; Mastelaro, Valmor Roberto; Hernandes, Antônio Carlos; Ibanez, Alain (Solid State Sciences, 2008)