**Acknowledgements**

Most of the results reported in this chapter are derived from B. Sc. (K. Lira-Méndez, UA Tamaulipas; M. Martínez-Garnica, UA Aguascalientes); M. Sc. (M. Martinez-Garnica, IT Aguascalientes) and Dr. Sci. (R.Méndez-Aguilar, CICATA Altamira-IPN) theses. COSNET-SEP and CONACYT supported graduate studies of MMG and RMA. This work was supported by International Foundation for Science (grant no. AC/3201-1) from Stockholm, Sweden; COSNET-DGETA-SEP; Instituto Politécnico Nacional (grant no. 1350) and CONACYT-Ciencia Básica (grants no. 48457-Z and no. 176282). JSPR, RRS, FJIP, RMA & NMP are SNI scholars, and SHD is EDI-IPN and COFAA-IPN scholar.
