Ja Sparenberg

ON OPTIMUM SCREW PROPELLERS WITH END PLATES, INHOMOGENEOUS INFLOW

L Klaren, Ja Sparenberg, 1981 .

ON THE INFLUENCE OF CHOICE OF GENERATOR LINES ON THE OPTIMUM EFFICIENCY OF SCREW PROPELLERS

Ja Sparenberg, K de Jong, 1990 .

ON USEFUL SHAPES OF RIGID WINGS FOR LARGE-AMPLITUDE SCULLING PROPULSION

P Sijtsma, Ja Sparenberg, 1992 .