@article{GDZPPN002075482, title = {Communication.}, journal = {Elemente der Mathematik}, volume = {19}, year = {1964}, pages = {120-120}, url = {http://dml.mathdoc.fr/item/GDZPPN002075482} }
Piccard, S. Communication.. Elemente der Mathematik, Tome 19 (1964) p. 120. http://gdmltest.u-ga.fr/item/GDZPPN002075482/