Pérez, F. , Sossa, H. , Martínez, R. , Lorias, D. , Minor, A.. "Video-Based Tracking of Laparoscopic Instruments Using an Orthogonal Webcams System". World Academy of Science, Engineering and Technology, Open Science Index 80, International Journal of Biomedical and Biological Engineering (2013), 7(8), 440 - 443.