Precise large deviations for sums of dependent random variables with subexponential distribution

In this article, we study the precise large deviations for sums of non identically distributed random variables {Xi,i≥1} with distribution functions {Fi,i≥1} that are widely upper orthant dependent (WUOD, in short) and ϕ-mixing. Moreover, the random variables are dependent, according to some copulas. We assume that the average of the right tails of distribution functions Fi is equivalent to the subexponential distribution F.