@article{PIM_1947_S_S_I_01_a7,
     author = {R. Ka\v{s}anin},
     title = {Le {Coefficient} {D'Approximation} {Moyenne} {Et} {Le} {Coefficient} {De} {Corr\'elation}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {71 },
     publisher = {mathdoc},
     volume = {_S_S_I},
     number = {01},
     year = {1947},
     url = {http://geodesic.mathdoc.fr/item/PIM_1947_S_S_I_01_a7/}
}