@article{SF_1989__38_2_134961,
     author = {Gy\"orgy Poll\'ak},
     title = {A new example of a limit variety.},
     journal = {Semigroup forum},
     pages = {283--304},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1989},
     zbl = {0669.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__38_2_134961/}
}