@article{MM2_1989__63_3_155370,
     author = {D. Bierlein and W.J.A. Stich},
     title = {On the {Extremality} of measure extensions.},
     journal = {Manuscripta mathematica},
     pages = {89--98},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1989},
     zbl = {0663.28004},
     url = {http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155370/}
}