Verdon, N. ., A. . Lefebvre-Lepot, L. . Lobry, and P. . Laure. “Contact Problems for Particles in a Shear Flow”. European Journal of Computational Mechanics, vol. 19, no. 5-7, Aug. 2010, pp. 513-31, doi:10.13052/EJCM.19.513-531.