Hydrothermal synthesis of zirconia doped with naturally mixed rare earths oxides and their electrochemical properties for possible applications in solid oxide fuel cells oleh Ghiță Andreea-Nicoleta, Slobozeanu Anca Elena, Licu Lidia, Ciobota Cristina Florentina, Sobetkii Arcadii, Vasile Bogdan Stefan, Miculescu Florin, Piticescu Radu Robert