Deltuvienė, Dovilė, and Leonas Saulis. “Asymptotic Expansions in the Large Deviation Zones for the Distribution Function of Sums of Random Variables in the Series Scheme”. Lietuvos Matematikos Rinkinys, vol. 43, no. spec., Dec. 2003, pp. 682–686, https://doi.org/10.15388/LMR.2003.32564.