Funding for this research was provided by:
Ministerio de Educación, Cultura y Deporte (MTM2016-79436-P)
Universidad de Las Palmas de Gran Canaria (ULPGC 2014-04)
Article History
Received: 11 July 2017
Revised: 20 February 2018
Accepted: 20 April 2018
First Online: 28 April 2018