1. Yu. V. Prokhorov, ?Convergence of stochastic processes and limit theorems in probability theory,? Teor. Veroyatn. Ee Primen.,1, No. 2, 177?238 (1956).
2. A. V. Skorokhod, Studies in Stochastic Processes [in Russian], Kiev State Univ., Kiev (1961).
3. S. V. Nagaev, ?On the rate of convergence in a boundary problem. I,? Teor. Veroyatn. Ee Primen.,15, No. 2, 179?199 (1970).
4. A. A. Borovkov, ?On the rate of convergence in the invariance principle,? Teor. Veroyatn. Ee Primen.,18, No. 2, 218?233 (1973).
5. A. I. Sokhanenko, ?On the rate of convergence in a boundary problem,? Teor. Veroyatn. Ee Primen.,19, No. 2, 416?421 (1974).