@article{10_1017_S0017089505002715,
     author = {SEBESTY\'EN, ZOLT\'AN and POPOVICI, DAN},
     title = {POSITIVE {DEFINITE} {FUNCTIONS} {AND} {SEBESTY\'EN'S} {OPERATOR} {MOMENT} {PROBLEM}},
     journal = {Glasgow mathematical journal},
     pages = {471--488},
     year = {2005},
     volume = {47},
     number = {3},
     doi = {10.1017/S0017089505002715},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002715/}
}