Series volumes

Engel, M.S. & Perkovsky, E.E., 2006. An Eocene Bee in Rovno Amber, Ukraine (Hymenoptera: Megachilidae). Amer. Mus. Novitates (no. 3506), 12 Jan 2006: 12 pp., 2 figs.. ≡

Chapters

Perkovsky, E.E., Zosimovich, V.Yu. & Vlaskin, A.P., 2010. Chapter 7. Rovno Amber. In D. Penney (ed.), Biodiversity of Fossils in Amber from the Major World Deposits: 116-136. ≡