<2010-11>

Foster, M.A., Harvey, H.M. (2010), Knickpoints in tributaries of the South Fork Eel River, Northern California, Master of Science thesis, Humboldt State University.

<2012-13>

Foster, M. A. and H. M. Kelsey (2012), Knickpoint and knickzone formation and propagation, South Fork Eel River, northern California, Geosphere, 8, 403-416. doi: 10.1130/GES00700.1