Cheng, K.; Shum, C.; Han, S.; Yi, Y.; Martin, D. (2001). "Application of GPS-Buoy Water Level Instrument for Radar Altimeter Calibration". Gravity, Geoid and Geodynamics 2000. International Association of Geodesy Symposia. Vol. 123. Berlin, Heidelberg: Springer Berlin Heidelberg. pp. 171–178. doi:10.1007/978-3-662-04827-6_29. ISBN978-3-642-07634-3. ISSN0939-9585.
Rocken, Christian; Kelecy, Thomas M.; Born, George H.; Young, Larry E.; Purcell, George H.; Wolf, Susan Kornreich (1990). "Measuring precise sea level from a buoy using the global positioning system". Geophysical Research Letters. 17 (12). American Geophysical Union (AGU): 2145–2148. Bibcode:1990GeoRL..17.2145R. doi:10.1029/gl017i012p02145. ISSN0094-8276.
Rocken, Christian; Kelecy, Thomas M.; Born, George H.; Young, Larry E.; Purcell, George H.; Wolf, Susan Kornreich (1990). "Measuring precise sea level from a buoy using the global positioning system". Geophysical Research Letters. 17 (12). American Geophysical Union (AGU): 2145–2148. Bibcode:1990GeoRL..17.2145R. doi:10.1029/gl017i012p02145. ISSN0094-8276.
Cheng, K.; Shum, C.; Han, S.; Yi, Y.; Martin, D. (2001). "Application of GPS-Buoy Water Level Instrument for Radar Altimeter Calibration". Gravity, Geoid and Geodynamics 2000. International Association of Geodesy Symposia. Vol. 123. Berlin, Heidelberg: Springer Berlin Heidelberg. pp. 171–178. doi:10.1007/978-3-662-04827-6_29. ISBN978-3-642-07634-3. ISSN0939-9585.
Rocken, Christian; Kelecy, Thomas M.; Born, George H.; Young, Larry E.; Purcell, George H.; Wolf, Susan Kornreich (1990). "Measuring precise sea level from a buoy using the global positioning system". Geophysical Research Letters. 17 (12). American Geophysical Union (AGU): 2145–2148. Bibcode:1990GeoRL..17.2145R. doi:10.1029/gl017i012p02145. ISSN0094-8276.