@article{1177706278, author = {Isbell, J. R.}, title = {On a Problem of Robbins}, journal = {Ann. Math. Statist.}, volume = {30}, number = {4}, year = {1959}, pages = { 606-610}, language = {en}, url = {http://dml.mathdoc.fr/item/1177706278} }
Isbell, J. R. On a Problem of Robbins. Ann. Math. Statist., Tome 30 (1959) no. 4, pp. 606-610. http://gdmltest.u-ga.fr/item/1177706278/