S. Leonard et al., "Evaluation and Stability Analysis of Video-Based Navigation System for Functional Endoscopic Sinus Surgery on In Vivo Clinical Data," in IEEE Transactions on Medical Imaging, vol. 37, no. 10, pp. 2185-2195, Oct. 2018. doi: 10.1109/TMI.2018.2833868. http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8355790&isnumber=8478012