@article{MAN_1991__289_4_164777,
     author = {Konrad Schm\"udgen},
     title = {The {K-moment} problem for compact semi-algebraic sets.},
     journal = {Mathematische Annalen},
     pages = {203--206},
     publisher = {mathdoc},
     volume = {289},
     number = {4},
     year = {1991},
     zbl = {0744.44008},
     url = {http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164777/}
}