M. Sadiku, R. Garcia, S. Musa, and S. Nelatury. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (1):
106--112(January 2015)
M. na, and M. Carrasco. Internacional Technology, Education and Development Conference, (March 2010)De la versión en Cd-Rom: ISBN 978-84-613-5538-9 (proceedings);
ISBN 978-84-613-5536-5 (abstracts).