@article{PIM_1985_N_S_38_52_a13,
     author = {K. Todorov},
     title = {Ueber die {Zyklisch-inversen} {Unterhalbgruppen} der {Symmetrischen} {Halbgruppe} tx},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {87 },
     publisher = {mathdoc},
     volume = {_N_S_38},
     number = {52},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1985_N_S_38_52_a13/}
}