@article{02236285, title = {The case of equality in Landau's problem.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2005}, year = {2005}, pages = {1781-1793}, doi = {10.1155/IJMMS.2005.1781}, zbl = {1077.26008}, language = {en}, url = {http://dml.mathdoc.fr/item/02236285} }
Hagerty, G.W.; Nag, P. The case of equality in Landau's problem.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 1781-1793. doi : 10.1155/IJMMS.2005.1781. http://gdmltest.u-ga.fr/item/02236285/