@article{SF_1996__53_2_135502,
     author = {M.B. Szendrei and G. Poll\'ak},
     title = {Problems {(Raised} at the {Colloquium} on {Semigroups,} {Szeged,} 15-19 {August,} 1994).},
     journal = {Semigroup forum},
     pages = {390--393},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135502/}
}