@article{MOMA_1978__85_177874,
     author = {G\"oran H\"ogn\"as},
     title = {A {Note} on the {Product} of {Random} {Elements} of a {Semigroup.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {317--322},
     publisher = {mathdoc},
     volume = {85},
     year = {1978},
     zbl = {0384.60044},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1978__85_177874/}
}