@article{TVP_1973_18_4_a7,
     author = {J. Hagberg},
     title = {Approximation of the summation process obtained by sampling from a finite population},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {790--803},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TVP_1973_18_4_a7/}
}