D. J. Di Carlo

Flight investigation of VTOL control and display concept for performing decelerating approaches to an instrument hover

R. W. Sommer, J. F. Garren, J. R. Kelly, 1971 .

Flight investigation to determine the effect of longitudinal characteristics on low-speed instrument operation

R. W. Sommer, J. R. Kelly, D. J. Di Carlo, 1968 .