X. Xu, S. Negahdaripour; Automatic optical station keeping and navigation of an ROV; sea trial experiments, Proceedings of MTS/IEEE OCEANS'99 Conference, pp. 71 - 76, September 1999.

X. Xu, S. Negahdaripour; Recent advances in vision-based station keeping, navigation and video mosaicking for unmanned submersible vehicles; sea trial experiments, Proceedings of the 11th International Symposium on Unmanned Untethered Submersible Technology, vol. 11, pp. 248 - 256, August 1999.

S. Negahdaripour, X. Xu, A. Khamene; Applications of direct 3D motion estimation for underwater machine vision systems, Proceedings of IEEE OCEANS'98 Conference, pp. 51 - 55, September 1998.

S. Negahdaripour, X. Xu, A. Khamene, Z. Awan; 3-D motion and depth estimation from sea-floor images for mosaic-based station-keeping and navigation of ROVs/AUVs and high-resolution sea-floor mapping, Proceedings of 1998 Symposium on Autonomous Underwater Vehicle Technology, pp. 191 - 200, June 1998.

Shahriar Negahdaripour, Xun Xu; Trajectory following and mosaicing of ocean floor images by direct estimation of vehicle motion from time-varying imagery, Proceedings of the Tenth International Symposium on Unmanned Untethered Submersible Technology, vol. 10, pp. 109 - 116, September 1997.

Xun Xu, Shahriar Negahdaripour; Vision-based motion sensing for underwater navigation and mosaicing of ocean floor images, Proceedings of MTS/IEEE OCEANS'97 Conference, pp. 1412 - 1417, September 1997.

L. Jin, X. Xu, S. Negahdaripour, C. Tsukamoto, J. Yuh; A real-time vision-based stationkeeping system for underwater robotics applications, Proceedings of MTS/IEEE OCEANS'96 Conference, pp. 1076 - 1081, September 1996.