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@article{PORMA_1961__20_1_114845, author = {Guy, Douglas L.}, title = {Common extensions of finitely additive probability measures}, journal = {Portugaliae mathematica}, pages = {1--5}, publisher = {mathdoc}, volume = {20}, number = {1}, year = {1961}, zbl = {0113.11902}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1961__20_1_114845/} }
Guy, Douglas L. Common extensions of finitely additive probability measures. Portugaliae mathematica, Tome 20 (1961) no. 1, pp. 1-5. http://geodesic.mathdoc.fr/item/PORMA_1961__20_1_114845/