BB DUGUNDJI, J. Topology. 11th printing. [s. l.]: Allyn and Bacon, 1976. ISBN 0205002714.
BB Higgins, P. J.. Introduction to topological groups / P. J. Higgins Cambridge : University Press, 1974
BB Munkres, James R. Topología / James R. Munkres; traducción, Ángel Ferrández Izquierdo ... [et al.] . - 2ª ed. Madrid : Prentice Hall, D.L. 2001
BB Willard, Stephen. General topology / Stephen Willard . - [1st. ed.] Reading, Massachusetts [etc.] : Addison-Wesley, cop. 1970