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@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}, publisher = {mathdoc}, volume = {81}, year = {1976}, zbl = {0321.40004}, url = {http://geodesic.mathdoc.fr/item/MOMA_1976__81_177747/} }
P. Szüsz. On Mercer's Theorem for (C, 2) - Means.. Monatshefte für Mathematik, Tome 81 (1976), pp. 149-152. http://geodesic.mathdoc.fr/item/MOMA_1976__81_177747/