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Obaltum 7-XII-1992 & 13-IV-1993
Supported by NSF grants DMS 8801226 and DMS 9100310
Supported by NSA grant MDA 904 92-H-3027
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Fong, P., Harris, M.E. On perfect isometries and isotypies in finite groups. Invent Math 114, 139–191 (1993). https://doi.org/10.1007/BF01232665
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DOI: https://doi.org/10.1007/BF01232665