Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{COMIM_1995__3_1_a7, author = {Tak\'acs, Jozef}, title = {Positivity theorem}, journal = {Communications in Mathematics}, pages = {67--70}, publisher = {mathdoc}, volume = {03}, number = {1}, year = {1995}, mrnumber = {1474068}, zbl = {0854.35084}, language = {en}, url = {http://geodesic.mathdoc.fr/item/COMIM_1995__3_1_a7/} }
Takács, Jozef. Positivity theorem. Communications in Mathematics, Tome 03 (1995) no. 1, pp. 67-70. http://geodesic.mathdoc.fr/item/COMIM_1995__3_1_a7/