[Laidlaw et al., 2005]
David H. Laidlaw, Michael Kirby, Cullen Jackson, J. Scott Davidson, Timothy Miller, Marco DaSilva, William Warren, and Michael Tarr. Comparing 2D vector field visualization methods: A user study. In IEEE Transactions on Visualization and Computer Graphics, 11(1):59-70, January-February 2005. (pdf) (bibtex: Laidlaw-2005-CVF).