Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{PMFA_1979__24_4_a7, author = {Smullyan, R. M.}, title = {Matematick\'e h\'adanky}, journal = {Pokroky matematiky, fyziky a astronomie}, pages = {212--217}, publisher = {mathdoc}, volume = {24}, number = {4}, year = {1979}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/PMFA_1979__24_4_a7/} }
Smullyan, R. M. Matematické hádanky. Pokroky matematiky, fyziky a astronomie, Tome 24 (1979) no. 4, pp. 212-217. http://geodesic.mathdoc.fr/item/PMFA_1979__24_4_a7/