@article{SF_1970__1_133781,
     author = {R.J. Koch},
     title = {Compact connected spaces supporting topological semigroups.},
     journal = {Semigroup forum},
     pages = {95--102},
     publisher = {mathdoc},
     volume = {1},
     year = {1970},
     zbl = {0218.22005},
     url = {http://geodesic.mathdoc.fr/item/SF_1970__1_133781/}
}