Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{UM_2012__20_1_a12, author = {Calda, Emil}, title = {O konci sv\v{e}ta, maysk\'em kalend\'a\v{r}i a planet\v{e} {Nibiru}}, journal = {U\v{c}itel matematiky}, pages = {61--64}, publisher = {mathdoc}, volume = {20}, number = {1}, year = {2012}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/UM_2012__20_1_a12/} }
Calda, Emil. O konci světa, mayském kalendáři a planetě Nibiru. Učitel matematiky, Tome 20 (2012) no. 1, pp. 61-64. http://geodesic.mathdoc.fr/item/UM_2012__20_1_a12/