Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{UM_1997__5_1_a13, author = {Henry, B.}, title = {Bl\'aboliv\'a metafyzika kruhu aneb jak u\v{s}et\v{r}it 127,- {K\v{c}}}, journal = {U\v{c}itel matematiky}, pages = {56--57}, publisher = {mathdoc}, volume = {05}, number = {1}, year = {1997}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/UM_1997__5_1_a13/} }
Henry, B. Blábolivá metafyzika kruhu aneb jak ušetřit 127,- Kč. Učitel matematiky, Tome 05 (1997) no. 1, pp. 56-57. http://geodesic.mathdoc.fr/item/UM_1997__5_1_a13/