Lanthanide trifluoromethanesulfonate complexes with 'EPSILON'-caprolactam: synthesis, characterization and structure of the praseodymium compound - Alvarez, H A; Matos, Jivaldo do Rosário; Isolani, Paulo Celso; Vicentini, Geraldo; Castellano, Eduardo Ernesto; Zukerman-Schpector, Júlio (Journal of Coordination Chemistry, 1998)