@article{00038594,
title = {Two countable Hausdorff almost regular spaces every continuous map of which into every Urysohn space is constant.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {14},
year = {1991},
pages = {709-714},
doi = {10.1155/S0161171291000959},
zbl = {0757.54006},
language = {en},
url = {http://dml.mathdoc.fr/item/00038594}
}
Tzannes, V. Two countable Hausdorff almost regular spaces every continuous map of which into every Urysohn space is constant.. International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 709-714. doi : 10.1155/S0161171291000959. http://gdmltest.u-ga.fr/item/00038594/