@article{10_14708_ma_v36i50_09_1503,
     author = {Ryszard Zieli\'nski},
     title = {Estimation of proportion},
     journal = {Mathematica Applicanda},
     pages = { 76--90},
     publisher = {mathdoc},
     volume = {36},
     number = {50/09},
     year = {2008},
     doi = {10.14708/ma.v36i50/09.1503},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v36i50/09.1503/}
}