1. Topological Groups and Related Structures;Arhangel'skii,2008
2. Generalizing separability, precompactness and narrowness in topological groups;Banakh;Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat.,2021
3. Éléments de mathématique, Algèbre I;Bourbaki,1974
4. A precompactness test for topological groups in the manner of Grothendieck;Bouziad;Topol. Proc.,2007
5. Embeddings in contractible or compact objects;Brown;Colloq. Math.,1977