Synthesis characterization and study of emission nmr and cosy spectra of tris (3,4,5-trihydroxy-1-cyclohexene-1-caboxylate) europium (iii)-dihydrate - Silva-Valenzuela, M G; Zinner, Klaus; Isolani, Paulo Celso; Vicentini, Geraldo (Anais da Associacao Brasileira de Quimica, 1996)