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\bibitem{2646} Onur Ferhat, Arcadi Llanza, \& Fernando Vilari{\~n}o. (2015). A Feature-Based Gaze Estimation Algorithm for Natural Light Scenarios. In \textit{Pattern Recognition and Image Analysis, Proceedings of 7th Iberian Conference , ibPRIA 2015} (Vol. 9117, pp. 569--576). LNCS. Springer International Publishing.

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