Hartmann, G. K. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Hartmann, G. K. (1996). Data growth rate problems and problems with long-term data. In W. Dieminger, G. K. Hartmann, & R. Leitinger (Eds.), The Upper Atmosphere: Data Analysis and Interpretation (pp. 956-994). Berlin: Springer.