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Supported by a Humboldt Foundation Research Award for Senior U.S. Scientists.
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Nomizu, K., Sasaki, T. A new model of unimodular-affinely homogeneous surfaces. Manuscripta Math 73, 39–44 (1991). https://doi.org/10.1007/BF02567627
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DOI: https://doi.org/10.1007/BF02567627