• Phase formation and microstructure in Rel-xCaxBa2Cu3Oz (Re=Y, Eu, Er; X=0, 0.2, 0.3) superconducting ceramicsStoyanova-Ivanova, Angelina; Terzieva, Stanimira; Staneva, Anna; Mikli, Valdek; Traksmaa, Rainer; Dimitriev, Y.B.; Kovachev, V.T.Central European science journals. Central European journal of chemistry : CEJC2005 / 1, p. 167-174