[B1] T.F. Banchoff, Tightly embedded 2-dimensional polyhedral
       manifolds, Amer. J. Math. 87 (1965) 462-472.
The author gives substantial tight embeddings of piecewise-linear
surfaces for any n bigger than 2, and he gives a bound in terms
of the Euler characteristic on the highest dimension for a substantial
tight embedding of a given surface.  The paper includes several
explicit examples.
 10/12/94 dpvc@geom.umn.edu -- 
The Geometry Center