“…Based on the survey and some of the new results conducted for Chapter 2 and Chapter 4, we published a paper on Revista de Informática Teórica e Aplicada [65]. Furthermore, based on the results described in Chapter 3, we also published a paper on Information Processing Letters (IPL) [64]. Finally, based on the results described in Chapter 5, we are preparing a third paper to submit to an international conference or journal yet to be determined.…”