@article{GDZPPN001250868, title = {Is Topologically Simple Simple?}, journal = {Semigroup forum}, volume = {11}, year = {1975}, pages = {90-93}, zbl = {0308.22004}, url = {http://dml.mathdoc.fr/item/GDZPPN001250868} }
Mukherjea, A.; CLARK, W.E. Is Topologically Simple Simple?. Semigroup forum, Tome 11 (1975) pp. 90-93. http://gdmltest.u-ga.fr/item/GDZPPN001250868/