@article{SF_1995__50_3_135367,
     author = {L.A.B. San Martin and P.A. Tonelli},
     title = {Semigroup actions on homogeneous spaces.},
     journal = {Semigroup forum},
     pages = {59--88},
     year = {1995},
     volume = {50},
     number = {3},
     zbl = {0826.22007},
     url = {http://geodesic.mathdoc.fr/item/SF_1995__50_3_135367/}
}