Author:
Damon James,Giblin Peter,Haslinger Gareth
Publisher
Springer International Publishing
Reference2 articles.
1. J.W. Bruce, P.J. Giblin, Projections of surfaces with boundary. Proc. Lond. Math Soc. (3) 60, 392–416 (1990)
2. Additional material on corners and some other cases, pdf file available at https://www.liv.ac.uk/~pjgiblin/papers/corners2-3.pdf and http://www.math.unc.edu/Faculty/jndamon