@article{SF_1988__37_1_134939,
     author = {L. M\'arki},
     title = {Problems {(Szeged} {Colloquium).}},
     journal = {Semigroup forum},
     pages = {367--374},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1988},
     zbl = {0692.20044},
     url = {http://geodesic.mathdoc.fr/item/SF_1988__37_1_134939/}
}