@article{MAN_1974__212_182741,
     author = {I.G. Rosenberg},
     title = {Some {Maximal} {Closed} {Classes} of {Operations} on {Infinite} {Sets.}},
     journal = {Mathematische Annalen},
     pages = {157--164},
     publisher = {mathdoc},
     volume = {212},
     year = {1974},
     zbl = {0281.08001},
     url = {http://geodesic.mathdoc.fr/item/MAN_1974__212_182741/}
}