Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{UM_2009__17_1_a7, author = {Calda, Emil}, title = {Co mus{\'\i} (?) obsahovat u\v{c}ebnice}, journal = {U\v{c}itel matematiky}, pages = {53--55}, publisher = {mathdoc}, volume = {17}, number = {1}, year = {2009}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/UM_2009__17_1_a7/} }
Calda, Emil. Co musí (?) obsahovat učebnice. Učitel matematiky, Tome 17 (2009) no. 1, pp. 53-55. http://geodesic.mathdoc.fr/item/UM_2009__17_1_a7/