@conference {cCanton-Ferrer07a, title = {Head Orientation Estimation using Particle Filtering in Multiview Scenarios}, booktitle = {CLEAR{\textquoteright}07 Second International Evaluation Workshop on Classification of Events, Activities and Relationships}, year = {2007}, pages = {1{\textendash}11}, isbn = {978-3-540-68584-5}, author = {Cristian Canton-Ferrer and Casas, J. and M. Pard{\`a}s} }