Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1987_42_3_a10, author = {V. V. Tkachuk}, title = {Homeomorphisms of free topological groups do not preserve compactness}, journal = {Matemati\v{c}eskie zametki}, pages = {455--462}, publisher = {mathdoc}, volume = {42}, number = {3}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_3_a10/} }
V. V. Tkachuk. Homeomorphisms of free topological groups do not preserve compactness. Matematičeskie zametki, Tome 42 (1987) no. 3, pp. 455-462. http://geodesic.mathdoc.fr/item/MZM_1987_42_3_a10/