Geodesic
The simplest example of a completely regular, non-normal space
Problemy analiza, no. 4 (1997), pp. 97-98 Cet article a éte moissonné depuis la source Math-Net.Ru

Voir la notice de l'article

Still another example of a completely regular nonnormal space is given. This one is marked by brevity, clarity and graphic representation, which may be of some interest to those who teach general topology to students. 
@article{PA_1997_4_a6,
     author = {K. V. Matyushichev},
     title = {The simplest example of a completely regular, non-normal space},
     journal = {Problemy analiza},
     pages = {97--98},
     year = {1997},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PA_1997_4_a6/}
}
TY  - JOUR
AU  - K. V. Matyushichev
TI  - The simplest example of a completely regular, non-normal space
JO  - Problemy analiza
PY  - 1997
SP  - 97
EP  - 98
IS  - 4
UR  - http://geodesic.mathdoc.fr/item/PA_1997_4_a6/
LA  - ru
ID  - PA_1997_4_a6
ER  - 
%0 Journal Article
%A K. V. Matyushichev
%T The simplest example of a completely regular, non-normal space
%J Problemy analiza
%D 1997
%P 97-98
%N 4
%U http://geodesic.mathdoc.fr/item/PA_1997_4_a6/
%G ru
%F PA_1997_4_a6
K. V. Matyushichev. The simplest example of a completely regular, non-normal space. Problemy analiza, no. 4 (1997), pp. 97-98. http://geodesic.mathdoc.fr/item/PA_1997_4_a6/