M. Ashraf, J. Lucas; Underwater object recognition technique using ultrasonics, Proceedings of IEEE OCEANS'94 Conference, pp. 170 - 175, September 1994.
J. S. Smith, R. Yu, I. Sarafis, J. Lucas; Computer vision control of an underwater manipulator, Proceedings of IEEE OCEANS'94 Conference, pp. 187 - 192, September 1994.