RAMÍREZ-FALICOV MODEL RARE EARTHS TIERRAS RARAS CERIO ALFA CERIUM-ALPHA BAJA TEMPERATURA CERIO CERIUM COMPORTAMIENTO MAGNETICO Comments on electronic phase transition inb Ce1XLax alloys ELASTIC PROPERTIES Effect af rare earth impurities on the α - γ transition in metallic Ce Effect of finite f level linewidth on the theory of the x-y transition in Ce Electronic phase transition in Ce1-X Lax alloys HIBRIDIZACION HYBRIDIZATION HYBRIDIZATION|HIBRIDIZACION IMPUREZAS IMPURITIES INTERVALO DE TEMPERATURA 0065-0273 K LANTANO LANTHANUM LOW TEMPERATURE Localized and virtual magnetoelastic states in a linear ehain MAGNETIC SUSCEPTIBILITY PHASE TRANSFORMATIONS PHYSICAL PROPERTIES PROPIEDADES ELASTICAS PROPIEDADES FISICAS SUSCEPTIBILIDAD MAGNETICA