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@article{MOMA_1996__121_3_178711, author = {Alexander Durner}, title = {On {Averaging} {Multisets.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {41--54}, publisher = {mathdoc}, volume = {121}, number = {3}, year = {1996}, zbl = {0853.52002}, url = {http://geodesic.mathdoc.fr/item/MOMA_1996__121_3_178711/} }
Alexander Durner. On Averaging Multisets.. Monatshefte für Mathematik, Tome 121 (1996) no. 3, pp. 41-54. http://geodesic.mathdoc.fr/item/MOMA_1996__121_3_178711/