1. Silvestrov, D.S.: A generalisation of Pólya’s theorem. Dokl. Akad. Nauk Ukr. SSR, Ser A (10), 906–909 (1968)
2. Silvestrov, D.S.: Limit theorems for a non-recurrent walk connected with a Markov chain. Ukr. Math. Zh. 21, 790–804 (1969). (English translation in Ukr. Math. J. 21, 657–669)
3. Silvestrov, D.S.: Limit Theorems for Semi-Markov Processes and their Applications to Random Walks. Candidate of Science dissertation, Kiev State University, 205 pp. (1969)
4. Silvestrov, D.S.: Limit theorems for semi-Markov processes and their applications. 1, 2. Teor. Veroyatn. Math. Stat. 3; Part 1: 155–172; Part 2: 173–194 (1970) (English translation in Theory Probab. Math. Stat. 3, Part 1: 159–176; Part 2: 177–198)
5. Silvestrov, D.S.: Remarks on the limit of composite random function. Teor. Veroyatn. Primen. 17, 707–715 (1972). (English translation in Theory Probab. Appl. 17, 669–677)