[B5] T.F. Banchoff, Tight polyhedral Klein bottles, projective planes and Möbius bands, Math. Ann. 207 (1974) 233-243.The author proves that there is not tight substantial Klein bottle in E^n for n bigger than 5, and gives geometric consequences of substantial embeddings in the highest possible dimension. He shows that a tight projective plane is essentially unique, as is a tight Möbius band.
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