@article{MM2_1990__66_1_155461,
     author = {J\"urgen Kindler},
     title = {The sigma-core of convex games and the problem of measure extension.},
     journal = {Manuscripta mathematica},
     pages = {97--108},
     publisher = {mathdoc},
     volume = {66},
     number = {1},
     year = {1990},
     zbl = {0682.28005},
     url = {http://geodesic.mathdoc.fr/item/MM2_1990__66_1_155461/}
}