@incollection{bib:de leeuw:1994,
    author       = { de Leeuw, W.C. },    
    title        = { Geometric Icons for Flow Visualization   },
    booktitle    = { Advances in Computer-Aided Engineering, CAD/CAM Research at Delft University of Technology },
    year         = { 1994 },
    publisher    = { Delft University Press },
    note         = { Report of the VF-Project CAD/CAM 1989-1994 },
    url          = { https://publications.graphics.tudelft.nl/papers/791 },
}