C. Bianchini, и F. Borgia. Proc. Intl Jubilee Congr. Technical University of Varna, 6, стр. 118-123. Varna, Technical University of Varna, University Press, (2012)
C. Bianchini, F. Borgia, и M. De Marsico. IEEE Proc. Intl Conf. on Advanced learning technologies (ICALT), стр. 526-530. New York NY, Institute of Electrical and Electronics Engineers, IEEE, (2012)