L. Zhu, M. Staples, and V. Tosic. 12th International IEEE Enterprise Distributed Object Computing Conference, 2008. EDOC '08, page 24--30. IEEE, (September 2008)
V. Zolotarev. Translations of Mathematical Monographs American Mathematical Society, Providence, RI, (1986)Translated from the Russian by H. H. McFaden, Translation edited by Ben Silver.