@article{MOMA_1976__81_177747,
     author = {P. Sz\"usz},
     title = {On {Mercer's} {Theorem} for {(C,} 2) - {Means.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {149--152},
     year = {1976},
     volume = {81},
     zbl = {0321.40004},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1976__81_177747/}
}