@article{RSA_1968__16_4_35_0,
     author = {Theodorescu, R.},
     title = {Remarques sur les plans d'\'echantillonnages optimaux},
     journal = {Revue de Statistique Appliqu\'ee},
     pages = {35--40},
     publisher = {Soci\'et\'e de Statistique de France},
     volume = {16},
     number = {4},
     year = {1968},
     language = {fr},
     url = {http://www.numdam.org/item/RSA_1968__16_4_35_0/}
}