Ruzhevych, Nadiya     On the asymptotic normality conditions for degenerate random vectors [Текст] / Nadiya Ruzhevych // Stochastic analysis and random dynamics : abstr. intern. conf., June 14-20, 2009, Lviv, Ukraine / Inst. of Mathematics of Ukr. Nat. Acad. of Sciences, I. Franko Nat. Univ. of Lviv, Nat. Univ. "Lvivska Politechnika". — Lviv, 2009. — P. 218.