@article{10_4064_cm_34_1_7_16,
     author = {Donald Marxen},
     title = {The topology of the free topological semigroup},
     journal = {Colloquium Mathematicum},
     pages = {7--16},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1975},
     doi = {10.4064/cm-34-1-7-16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-34-1-7-16/}
}