Gary K. Shaffer

Integrated Fahrzeugpositionier- and navigation system, the apparatus and method

J. L. Peterson, Sanjiv Singh, Dong Hun Shin, 1990 .

Integrated fahrzeugpositionier- and navigation which device and method

William Whittaker, Sanjiv Singh, Dong Hun Shin, 1990 .

Two-dimensional mapping of expansive unknown areas

Gary K. Shaffer, 1996 .