-
I. D. Shkredov, I. E. Shparlinski, “Double character sums with intervals and arbitrary sets”, Proc. Steklov Inst. Math., 303 (2018),
239–258 
-
B. S. Kashin, Yu. V. Malykhin, V. Yu. Protasov, K. S. Ryutin, I. D. Shkredov, “Sergei Vladimirovich Konyagin turns 60”, Proc. Steklov Inst. Math., 303 (2018),
1–9 -
MEI-CHU CHANG, IGOR E. SHPARLINSKI, “Double Character Sums over Subgroups and Intervals”, Bull. Aust. Math. Soc., 90:3 (2014),
376