Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1969__5_1_a3, author = {Timm, J\"urgen}, title = {Die {L\"osung} eines {Problems} von {Havel}}, journal = {Archivum mathematicum}, pages = {25--28}, publisher = {mathdoc}, volume = {05}, number = {1}, year = {1969}, mrnumber = {0277576}, zbl = {0238.16029}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/ARM_1969__5_1_a3/} }
Timm, Jürgen. Die Lösung eines Problems von Havel. Archivum mathematicum, Tome 05 (1969) no. 1, pp. 25-28. http://geodesic.mathdoc.fr/item/ARM_1969__5_1_a3/