@article{10_1017_S204061850003464X,
     author = {Howie, J. M.},
     title = {An embedding theorem with amalgamation for cancellative semigroups{\textdagger}},
     journal = {Glasgow mathematical journal},
     pages = {19--26},
     year = {1963},
     volume = {6},
     number = {1},
     doi = {10.1017/S204061850003464X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S204061850003464X/}
}