1. Tame Cantor sets in 𝐸³;Bing, R. H.;Pacific J. Math.,1961
2. Differentiable open maps;Church, P. T.;Bull. Amer. Math. Soc.,1962
3. Differentiable open maps on manifolds;Church, P. T.;Trans. Amer. Math. Soc.,1963
4. Light open maps on 𝑛-manifolds;Church, Philip T.;Duke Math. J.,1960
5. Princeton Mathematical Series, vol. 4;Hurewicz, Witold,1941