Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@misc{10_21136_CPM_1969_117655, title = {\'Ulohy a probl\'emy}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky}, pages = {223--225}, publisher = {mathdoc}, volume = {094}, number = {2}, year = {1969}, doi = {10.21136/CPM.1969.117655}, language = {cs}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1969.117655/} }
Úlohy a problémy. Časopis pro pěstování matematiky, Tome 094 (1969) no. 2, pp. 223-225. doi : 10.21136/CPM.1969.117655. http://geodesic.mathdoc.fr/articles/10.21136/CPM.1969.117655/
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