Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{PMFA_1998__43_2_a5, author = {de Castro, Rodrigo}, title = {O {Erd\"osov\v{e}} \v{c}{\'\i}sle}, journal = {Pokroky matematiky, fyziky a astronomie}, pages = {130--135}, publisher = {mathdoc}, volume = {43}, number = {2}, year = {1998}, zbl = {1042.01535}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/PMFA_1998__43_2_a5/} }
de Castro, Rodrigo. O Erdösově čísle. Pokroky matematiky, fyziky a astronomie, Tome 43 (1998) no. 2, pp. 130-135. http://geodesic.mathdoc.fr/item/PMFA_1998__43_2_a5/