@article{QUE_1996_1996_1_a12,
     author = {Guill\'en, Montserrat and Mart{\'\i}n, Xavier},
     title = {Estimaci\'on de la varianza muestral en la {Encuesta} de {Poblaci\'on} {Activa} espa\~nola.},
     journal = {Q\"uestii\'o},
     pages = {259-272},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1996},
     url = {http://geodesic.mathdoc.fr/item/QUE_1996_1996_1_a12/}
}