@article{10_4153_CJM_1966_048_1,
     author = {Hoehnke, Hans-J\"urgen},
     title = {Structure of {Semigroups}},
     journal = {Canadian journal of mathematics},
     pages = {449--491},
     year = {1966},
     volume = {18},
     number = {1},
     doi = {10.4153/CJM-1966-048-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-048-1/}
}