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References
- ↑ James Munkres, MIT Mathematics, mit.edu
- 1 2 Mathematics, The Tech , Volume 119, Issue 33, August 27, 1999
- ↑ Obstructions to the smoothing of piecewise-differentiable homeomorphisms, Ann. of Math., vol. 72 (1960)
- ↑ F. Wesley Wilson Jr., Pasting diffeomorphisms of Rn, Illinois J. Math., 16, 222-233 (1972)
- ↑ 2018 Class of the Fellows of the AMS, American Mathematical Society , retrieved 2017-11-03
