Kandhai, D., Hlushkou, D., Hoekstra, A. G., Sloot, P. M. A., Van As, H., & Tallarek, U. (2002). Influence of stagnant zones on transient and asymptotic dispersion in macroscopically homogeneous porous media. Physical Review Letters, 88(23), 234501. doi:10.1103/PhysRevLett.88.234501.