1. Austen, J.R., Franke, S.J., Liu, C.H., Yeh, K.C. Application of computerized tomography technique to ionospheric research. In: URSI and COSPAR International Beacon Satellite Symposium on Radio Beacon Contribution to the Study of Ionization and Dynamics of the Ionosphere and to Corrections to Geodesy and Technical Workshop, Oulu, Finland. Proc Partl, 25, A. Tauriainen, Ed., University of Oulu, ISBN 951-42-2256-3, 1986.
2. Ionospheric imaging using computerized tomography;Austen;Radio Sci.,1988
3. International reference ionosphere 2007: improvements and new parameters;Bilitza;Adv. Space Res.,2008
4. A new ionosphere monitoring technology based on gps;Brunini;Astrophys. Space Sci.,2004
5. Combined ionospheric campaign 1: ionospheric tomography and GPS total electron count (TEC) depletions;Bust;Geophys. Res. Lett.,2000