Haldoupis, C.; Schlegel, K.: Direct comparison of 1-m irregularity phase velocities and ion acoustic speeds in the auroral E region ionosphere. Journal Geophysical Research 95, pp. 18989 - 19000 (1990)

Hartogh, P.; Hartmann, G. K.: A high-resolution chirp transform spectrometer for microwave measurements. Meas. Sci. Technol. (1), pp. 592 - 595 (1990)

Hoppe, U.-P.; Fritts, D. C.; Reid, I. M.; Czechowsky, P.; Hall, C. M.; Hansen, T. L.: Multiple-frequency studies of the high-latitude summer mesosphere: Implication for scattering processes. Journal of Atmospheric and Terrestrial Physics 52, pp. 907 - 926 (1990)

Inhester, B.; Ulwick, J. C.; Cho, J.; Kelley, M. C.; Schmidt, G.: Consistency of rocket and radar electron density observations: implication about the anisotropy of mesospheric turbulence. Journal of Atmospheric and Terrestrial Physics 52, pp. 855 - 873 (1990)

Ip, W.-H.; Balsiger, H.; Geiss, J.; Goldstein, B. E.; Kettmann, G.; Lazarus, A.; Meier, A. J.; Rosenbauer, H.; Schwenn, R.; Shelley, E.: Giotto IMS measurements of the production rate of hydrogen cyanide in the coma of comet Halley. Annales Geophysicae 8 (5), pp. 319 - 326 (1990)

Isham, B.; Kofman, W.; Hagfors, T.; Nordling, J.; Thidé, B.; La Hoz, C.; Stubbe, P.: New phenomena observed by EISCAT during an RF ionospheric modification experiment. Radio Science 25, pp. 251 - 262 (1990)

Kelley, M. C.; Ulwick, J. C.; Röttger, J.; Inhester, B.; Hall, T.; Blix, T.: Intense turbulence in the polar mesosphere: rocket and radar measurements. Journal of Atmospheric and Terrestrial Physics 52, pp. 875 - 891 (1990)

Kettmann, G.; Ip, W.-H.; Balsiger, H.; Goldstein, B. E.; Meier, A.; Rosenbauer, H.; Schwenn, R.; Shelley, E. G.: Cometary ion flow variations at comet P/Halley as observed by the Giotto IMS experiment. Annales Geophysicae 8, pp. 229 - 238 (1990)

Kirchner, T.; Büchner, J.: On electron acceleration in extended radiosources by kinetic Alfvén waves. Advances in Space Research 10 (9), pp. 39 - 42 (1990)

Klostermeyer, J.: On the role of parametric instability of internal gravity waves in atmospheric radar observations. Radio Science 25, pp. 983 - 995 (1990)

Kofman, W.; Nielsen, E.: STARE and EISCAT measurements: Evidence for the Limitation of the STARE observations by ion-acoustic velocity. Journal Geophysical Research 95, p. 19131 (1990)

Leyser, T. B.; Thidé, B.; Derblom, H.; Hedberg, Å.; Lundborg, B.; Stubbe, P.; Kopka, H.: Dependence of stimulated electromagnetic emission on the ionosphere and pump wave. Journal Geophysical Research 95, pp. 17233 - 17244 (1990)

Liu, C. H.; Röttger, J.; Pan, C. J.; Franke, S. J.: A model for spaced antenna observational mode for MST radars. Radio Science 25, pp. 551 - 563 (1990)

Lübken, F. J.; von Zahn, U.; Manson, A.; Rüster, R.; Schmidt, G.; Widdel, H. U.: Mean state densities, temperatures and winds during the MAC/SINE and MAC/EPSILON campaign. Journal of Atmospheric and Terrestrial Physics 52, pp. 955 - 970 (1990)

Markiewicz, W. J.; Drury, L. O. C.; Völk, H. J.: Diffuse particle acceleration in spherically symmetric shock waves: supernova remnant origin of cosmic rays. Astronomy and Astrophysics 236, pp. 487 - 502 (1990)

Marsch, E.; Tu, C.-Y.: Spectral and spatial evolution of compressible turbulence in the inner solar wind. Journal Geophysical Research 95, pp. 11945 - 11956 (1990)

Marsch, E.; Tu, C.-Y.: On the radial evolution of MHD turbulence in the inner heliosphere. Journal Geophysical Research 95, pp. 8211 - 8229 (1990)

Marsden, R. G.; Afonin, V. V.; Balazs, A.; Erdoes, G.; Henrion, J. P. G.; Richter, A. K.; Rusznyak, P.; Somogyi, A.; Szalai, S.; Varga, A. et al.; Varhalmi, L.; Wenzel, K.-P.; Witte, M.: The Phobos low energy telescope charged particle experiment. Nucl. Instr. Metho in Phys. Res. A290, pp. 211 - 216 (1990)

Maul, A.-A.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Anregung periodischer Magnetfeldschwankungen durch Einstrahlung von amplitudenmodulierten Hochfrequenzwellen in die polare Ionosphäre. Kleinheubacher Berichte 33, pp. 141 - 149 (1990)

Maul, A.-A.; Rietveld, M. T.; Stubbe, P.; Kopka, H.: Excitation of periodic magnetic field oscillations in the ULF range by amplitude modulated HF waves. Annales Geophysicae 8, pp. 765 - 780 (1990)