1. A.V. Arkhangelskii and L.S. Pontryagin (eds.),General Topology, vol. I, Springer-Verlag, New York: 1990.
2. R.H. Bing, Concerning hereditarily indecomposable continua,Pacific Journal of Mathematics 1 (1951), 43–520.
3. R. Engelking,General Topology, PWN, 1977.
4. R. Engelking, “P.S. Aleksandrow,”Wiadomosci Matematyczne 20 (1978), 174–177.
5. R. Engelking and K. Sieklucki,Introduction to Topology, Amsterdam: North-Holland, 1994.