Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts
@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/} }
R. Kašanin. Le Coefficient D'Approximation Moyenne Et Le Coefficient De Corrélation. Publications de l'Institut Mathématique, _S_S_I (1947) no. 01, p. 71 . http://geodesic.mathdoc.fr/item/PIM_1947_S_S_I_01_a7/