@INPROCEEDINGS {34956,
author={A. Raposo and A. Gomes},
doi={10.24132/CSRN.2019.2901.1.13},
booktitle={International Conf. in Central Europe on Computer Graphics, Visualization and Computer Vision - WSCG},
title={Pi-surfaces: products of implicit surfaces towards constructive composition of 3D objects},
year={2019},
month={May},
volume={},
pages={-} 
}
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