Cancellations Amongst Kloosterman Sums
  We obtain several estimates for bilinear form with Kloosterman sums. Such results can be interpreted as a measure of cancellations amongst with parameters from short intervals. In particular, for certain ranges of parameters we improve some recent results of Blomer, Fouvry, Kowalski, Michel, and Mili\'cevi\'c (2014) and Fouvry, Kowalski and Michel (2014). 
I. E. Shparlinski, T. P. Zhang
math.NT