@article{1177730103, author = {Lev, Joseph}, title = {The Point Biserial Coefficient of Correlation}, journal = {Ann. Math. Statist.}, volume = {20}, number = {4}, year = {1949}, pages = { 125-126}, language = {en}, url = {http://dml.mathdoc.fr/item/1177730103} }
Lev, Joseph. The Point Biserial Coefficient of Correlation. Ann. Math. Statist., Tome 20 (1949) no. 4, pp. 125-126. http://gdmltest.u-ga.fr/item/1177730103/