Williams, Paul H., Dorjsuren Altanchimeg, Alexandr Byvaltsev, Roland De Jonghe, Saleem Jaffar, George Japoshvili, Sih Kahono, Huan Liang, Maurizio Mei, Alireza Monfared, Tshering Nidup, Rifat Raina, Zongxin Ren, Chawatat Thanoosing, Yanhui Zhao, and Michael C. Orr. “Widespread Polytypic Species or Complexes of Local Species? Revising Bumblebees of the Subgenus Melanobombus World-Wide (Hymenoptera, Apidae, Bombus)”. European Journal of Taxonomy 719, no. 1 (October 2, 2020): 1–120. Accessed April 24, 2024. https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1107.