Temperatue Dependence of the EPR Spectra of PrBa2Cu3O7–δ and Pr0.5Dy0.5Ba2Cu3O7–δ Compounds in Orthorhombic and Tetragonal Phases - Guskos, N.; Likodimos, W.; Kontos, A; Koufoudakis, A.; Mitros, Ch.; Gamari‐Seale, H.; Niarchos, D. (physica status solidi (b), 1991)