Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{KYB_1971__7_6_a4, author = {Ullrich, Milan and K\v{r}epela, Josef}, title = {Ein {Beitrag} zu {Stichprobenpl\"anen} mit mehreren {Merkmalen}}, journal = {Kybernetika}, pages = {--466}, publisher = {mathdoc}, volume = {07}, number = {6}, year = {1971}, mrnumber = {0317501}, zbl = {0256.62088}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/KYB_1971__7_6_a4/} }
Ullrich, Milan; Křepela, Josef. Ein Beitrag zu Stichprobenplänen mit mehreren Merkmalen. Kybernetika, Tome 07 (1971) no. 6, p. 466. http://geodesic.mathdoc.fr/item/KYB_1971__7_6_a4/