@article{CMH_1971__46_139468,
     author = {D.Z. Djokovic},
     title = {A {Problem} of {Mapping} a {Finite} {Set} into a {Set} of {Positive} {Measure}},
     journal = {Commentarii mathematici Helvetici},
     pages = {137--140},
     publisher = {mathdoc},
     volume = {46},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/CMH_1971__46_139468/}
}