Parker, Gary; Klingeman, Peter C. (2010). "On why gravel bed streams are paved". Water Resources Research. 18 (5): 1409–1423. doi:10.1029/WR018i005p01409.
Ashworth, Philip J.; Ferguson, Robert I. (1989). "Size-selective entrainment of bed load in gravel bed streams". Water Resources Research. 25 (4): 627–634. Bibcode:1989WRR....25..627A. doi:10.1029/WR025i004p00627.
Ashworth, Philip J.; Ferguson, Robert I. (1989). "Size-selective entrainment of bed load in gravel bed streams". Water Resources Research. 25 (4): 627–634. Bibcode:1989WRR....25..627A. doi:10.1029/WR025i004p00627.