@article{MS2_1987__60_167005,
     author = {Claes Fernstr\"om},
     title = {On the instability of {Hausdorff} content.},
     journal = {Mathematica Scandinavica},
     pages = {19--30},
     publisher = {mathdoc},
     volume = {60},
     year = {1987},
     zbl = {0641.31002},
     url = {http://geodesic.mathdoc.fr/item/MS2_1987__60_167005/}
}