- Correspondence to Dr Joaquin Lasheras Velasco, Computer Engineering Faculty, Catholic University of Murcia, Campus de los Jerónimos, Nº 135 Guadalupe 30107, Murcia, Spain;
- Received April 27, 2016
- Revised April 20, 2017
- Accepted June 11, 2017
- First published August 2, 2017.
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