Correlating phase and microstructure development versus dielectric properties in 'La POT. 3+' and 'Er POT. 3+' co-doped 'Bi IND. 4''Ti IND. 3''O IND. 12' ferroelectric ceramics - Santos, Valdeci Bosco dos; M'Peko, Jean-Claude; Mastelaro, Valmor Roberto (Journal of Alloys and Compounds, 2012)