Liou, Yuei-An; Hernandez-Pajares, Manuel; Chandrasekar, V.; Westwater, Edward R. (2008). "Special Section on Meteorology, Climate, Ionosphere, Geodesy, and Reflections from the Ocean Surfaces: Studies by Radio Occultation Methods". IEEE Transactions on Geoscience and Remote Sensing. 46 (11): 3363. Bibcode:2008ITGRS..46.3363L. doi:10.1109/TGRS.2008.2008049.
Liou, Yuei-An; Hernandez-Pajares, Manuel; Chandrasekar, V.; Westwater, Edward R. (2008). "Special Section on Meteorology, Climate, Ionosphere, Geodesy, and Reflections from the Ocean Surfaces: Studies by Radio Occultation Methods". IEEE Transactions on Geoscience and Remote Sensing. 46 (11): 3363. Bibcode:2008ITGRS..46.3363L. doi:10.1109/TGRS.2008.2008049.