@article{10_4064_cm_8_1_133_134,
     author = {J. H\'ajek},
     title = {Concerning relative accuracy of stratified and systematic sampling in a plane},
     journal = {Colloquium Mathematicum},
     pages = {133--134},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1961},
     doi = {10.4064/cm-8-1-133-134},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-133-134/}
}