@article{PPN362162808_0014+dmdlog7, title = {A note on a problem of Hua.}, journal = {Semigroup forum}, volume = {14}, year = {1977}, pages = {7-14}, zbl = {0358.20066}, url = {http://dml.mathdoc.fr/item/PPN362162808_0014+dmdlog7} }
Shyr, H.J.; Reis, C. M. A note on a problem of Hua.. Semigroup forum, Tome 14 (1977) pp. 7-14. http://gdmltest.u-ga.fr/item/PPN362162808_0014+dmdlog7/