1. Strongly negligible sets in Fréchet manifolds;Anderson, R. D.;Bull. Amer. Math. Soc.,1969
2. Monografie Matematyczne, Tom 58. [Mathematical Monographs, Vol. 58];Bessaga, Czesław,1975
3. Sur la compactification des espaces métriques;Engelking, R.;Fund. Math.,1959
4. [La] M. Lavrentiev, Contributions à la théorie des ensembles homéomorphes, Fund. Math. 6 (1924), 149–160.
5. [Le] A. Lelek, On the dimension of remainders in compact extensions, Soviet Math. Dokl. 6 (1965), 136–140.