The Physics of Rowing prepared by Dr. A. Dudhia, is a mine of useful information – refreshingly averse to assumptions about the status quo.
William C Atkinson's Rowing Computer Research is extremely interesting and informative.
Ken Young at the University of Washington has done some interesting works on Hydrodynamic lift in the sculling stroke.
Durham Boat Company have done more investigation into oar design than most – Dreher Oars and Skulls
