1. 1. J. Milnor, Lectures on characteristic classes, Princeton University, 1957 (mimeographed notes).
2. Topological manifolds and smooth manifolds;Milnor, J.,1963
3. 3. S. P. Novikov, Topological invariance of rational Pontryagin classes, Soviet Math. Dokl. 6 (1965), 921-923.
4. Smooth and piecewise linear surgery;Wagoner, J. B.;Bull. Amer. Math. Soc.,1967
5. 5. J. B. Wagoner, Appendix I (PL S-Cobordism), Doctoral Thesis, Princeton University, 1966.