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\bibitem{AngelD.Sappa_etal2016} Angel D. Sappa, Cristhian A. Aguilera, Juan A. Carvajal Ayala, Miguel Oliveira, Dennis Romero, Boris X. Vintimilla, et al. (2016). Monocular visual odometry: a cross-spectral image fusion based approach. \textit{Robotics and Autonomous Systems Journal}, \textit{Vol. 86}, pp. 26--36.

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