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Hwang, C.; Lin, M.-J. Fast integration of low orbiter’s trajectory perturbed by the Earth’s non-sphericity. (English) Zbl 0999.86010 J. Geod. 72, No. 10, 578-585 (1998). MSC: 86A30 PDFBibTeX XMLCite \textit{C. Hwang} and \textit{M. J. Lin}, J. Geod. 72, No. 10, 578--585 (1998; Zbl 0999.86010) Full Text: DOI