Synthesis, characterization and thermal behavior of some addition compounds between rare earth picrates (pic) and 2,2´-dithiobis(pyridine-N-oxide) - Marinho, E. P.; Sousa, W. S. C.; Melo, D. M. A.; Zinner, Lea Barbieri; Zinner, Klaus; Mercuri, Lucildes Pita; Vicentini, Geraldo (Thermochimica Acta, 2000)