Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{UM_1999__7_2_a8, author = {Tlust\'y, Pavel}, title = {O obsahu troj\'uheln{\'\i}ka}, journal = {U\v{c}itel matematiky}, pages = {117--118}, publisher = {mathdoc}, volume = {07}, number = {2}, year = {1999}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/UM_1999__7_2_a8/} }
Tlustý, Pavel. O obsahu trojúhelníka. Učitel matematiky, Tome 07 (1999) no. 2, pp. 117-118. http://geodesic.mathdoc.fr/item/UM_1999__7_2_a8/