[K4] N.H. Kuiper, "Tight embeddings and maps. Submanifolds of geometrical class three in E^N", in Proceedings of the Int. Symp. on Diff. Geom. in honor of S.-S. Chern, Berkeley, June 1979, Springer-Verlag, NY, Heidelberg, Berlin, 1980, 97-145.This is an extensive modern survey of tightness and related results. It includes some results for higher dimensions, and a large bibliography.
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