BondarevB.V. and Kozyr’S.M. 2010. Mixing “In the sense of Ibragimov.” Estimate for the rate of approach of a family of integral functionals of a solution of a differential equation with periodic coefficients to a family of wiener processes. Some applications. I. Ukrains’kyi Matematychnyi Zhurnal. 62, 6 (Jun. 2010), 733–753.