Representations by Quaternary Quadratic Forms with Coefficients $1$,   $2$, $5$ or $10$
  We determine explicit formulas for the number of representations of a positive integer $n$ by quaternary quadratic forms with coefficients $1$, $2$, $5$ or $10$. We use a modular forms approach. 
Ay\c{s}e Alaca and Mada Altiary
math.NT