Li, De Lang et Zhao, Chun Lai, Representation of Integers by Ternary Quadric Forms, Acta mathematica Sinica. English series (Print) , 17(4), 2000, pp. 715-720
In this paper we give a formula for the number of representations of some square-free integers by certain ternary quadratic forms and estimate the lower bound of the 2-power appearing in this number.