Gomes, R. M., and H. E. Borges. “Evolutionary and Hebbian Analysis of Hierarchically Coupled Associative Memories”. INFOCOMP Journal of Computer Science, vol. 11, no. 2, June 2012, pp. 43-55, https://infocomp.dcc.ufla.br/index.php/infocomp/article/view/355.