GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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\begin{thebibliography}{}
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\bibitem[OPS98]{OPS98}
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   J. Opgenorth, W. Plesken, and T. Schulz.
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   \newblock Crystallographic Algorithms and Tables.
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   \newblock {\em Acta Cryst A} 54, 517--531 (1998).
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\end{thebibliography}
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