Wills-Toro, L. A., J. D. Vélez, e T. Craven. 2009. “Graded Lie Algebras and Q-Commutative and R-Associative Parameters”. São Paulo Journal of Mathematical Sciences 3 (2):265-82. https://doi.org/10.11606/issn.2316-9028.v3i2p265-282.