Reference

Gholam Hosein Tahmasbi, Abolfazl Taghavi, Ebrahim Ebrahimi, Ali Asghar Talebi, Ali Zarnegar, Ali Reza Monfared (2008): Identification and Distribution of Bumblebees (Hymenoptera: Apidae, Bombus spp.) in Central Elburz Mountains of Iran – Entomofauna – 0029: 265 - 280.