@article{1250128570, author = {Sember, J.J. and Freedman, A. R.}, title = {On summing sequences of 0's and 1's}, journal = {Rocky Mountain J. Math.}, volume = {11}, number = {4}, year = {1981}, pages = { 419-426}, language = {en}, url = {http://dml.mathdoc.fr/item/1250128570} }
Sember, J.J.; Freedman, A. R. On summing sequences of 0's and 1's. Rocky Mountain J. Math., Tome 11 (1981) no. 4, pp. 419-426. http://gdmltest.u-ga.fr/item/1250128570/