@article{10_4064_ap_50_2_185_190,
     author = {Antoni Leon Dawidowicz},
     title = {On the positivity of an invariant measure on open non-empty sets},
     journal = {Annales Polonici Mathematici},
     pages = {185--190},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {1989},
     doi = {10.4064/ap-50-2-185-190},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-50-2-185-190/}
}