1. La classification des immersions combinatoires;Haefliger;Publs. Math. Inst. Ht. Etud. Scient. No. 23,1964
2. Immersions of manifolds;Hirsch;Trans. Am. Math. Soc.,1959
3. Smoothings of piecewise linear manifolds, (mimeographed);Hirsch,1964
4. Obstruction theories for smoothing manifolds and maps;Hirsch;Bull. Am. Math. Soc.,1963
5. N.H. Kuiper and R. Lashof: PL microbundles and bundles, to appear.