Ternary Goldbach's Problem Involving Primes of a Special Type
  Let $\eta$ be a quadratic irrationality. The variant of a ternary problem of Goldbach involving primes such that $a<\{\eta p\}<b$, where $a$ and $b$ are arbitrary numbers of the interval $(0,1)$, solved in this paper. 
Sergey A. Gritsenko and Natalya N. Motkina