Sanchis-Borras, C. , Molina-Garcia-Pardo, J. , Degauque, P. , Lienard, M. (2012). 'MIMO Performances in Tunnel Environment: Interpretation from the Channel Characteristics'. World Academy of Science, Engineering and Technology, Open Science Index 70, International Journal of Electronics and Communication Engineering, 6(10), 1169 - 1173.