M. T. Walter, Kim, J. - S., Steenhuis, T. S., Parlange, J. - Y., Heilig, A., Braddock, R. David, Selker, J., and Boll, J.,
“Funneled flow mechanisms in a sloping layered soil: Laboratory investigation”,
Water Resources Research, vol. 36, pp. 841–849, 2000.
]