@article{SF_1996__52_3_135434,
     author = {M.B. Szendrei},
     title = {The bifree regular {E-solid} semigroups.},
     journal = {Semigroup forum},
     pages = {61--82},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1996},
     zbl = {0841.20053},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135434/}
}