@article{CM_1970__22_1_137_0, author = {Atalla, Robert E.}, title = {On the non-measurability of a certain mapping}, journal = {Compositio Mathematica}, pages = {137--141}, publisher = {Wolters-Noordhoff Publishing}, volume = {22}, number = {1}, year = {1970}, mrnumber = {259058}, zbl = {0189.05802}, language = {en}, url = {http://archive.numdam.org/item/CM_1970__22_1_137_0/} }