%0 Journal Article %A Guangshi Lü %T Number of solutions of certain congruences %J Acta Arithmetica %D 2009 %P 317-328 %V 140 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa140-4-2/ %R 10.4064/aa140-4-2 %G en %F 10_4064_aa140_4_2