Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{PMFA_1988__33_1_a3, author = {Pudl\'ak, Pavel}, title = {O slo\v{z}itosti}, journal = {Pokroky matematiky, fyziky a astronomie}, pages = {20--34}, publisher = {mathdoc}, volume = {33}, number = {1}, year = {1988}, mrnumber = {0936119}, zbl = {0646.68048}, language = {cz}, url = {http://geodesic.mathdoc.fr/item/PMFA_1988__33_1_a3/} }
Pudlák, Pavel. O složitosti. Pokroky matematiky, fyziky a astronomie, Tome 33 (1988) no. 1, pp. 20-34. http://geodesic.mathdoc.fr/item/PMFA_1988__33_1_a3/