Williams, A.A. (September 1996). "Pumps as turbines for low cost micro hydro power". Renewable Energy. 9 (1–4): 1227–1234. doi:10.1016/0960-1481(96)88498-9.
psu.edu
citeseerx.ist.psu.edu
Agarwal, Tarang (November 2012). "Review of pump as turbine (PAT) for micro-hydropower". International Journal of Emerging Technology and Advanced Engineering. 2 (11): 163–169. CiteSeerX10.1.1.414.3606.