**Author details**

Abel García-Barrientos and Francisco R. Trejo-Macotela *Polytechnic University of Pachuca, Hidalgo, Mexico* 

Liz del Carmen Cruz-Netro *Polytechnic University of Altamira, Tamaulipas, Mexico* 

Volodymyr Grimalsky *Autonomous University of Morelos, Cuernavaca, Morelos, Mexico* 
