@article{SF_1990__40_1_135026,
     author = {M.B. Szendrei and J. Kadourek},
     title = {A new approach in the theory of orthodox semigroups.},
     journal = {Semigroup forum},
     pages = {257--296},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1990},
     zbl = {0705.20052},
     url = {http://geodesic.mathdoc.fr/item/SF_1990__40_1_135026/}
}