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Lien, N.T.P., Ha, N.T.T., Tuan, L.V., Ngan, D.H. and Nga, C.T.T. 2018. Study on solitary wasps of the subfamily Eumeninae (Hymenoptera: Vespidae) in Huu Lien and Na Hang nature reserves, with new records of one genus and three species. Academia Journal of Biology. 40, 3 (Nov. 2018). DOI:https://doi.org/10.15625/2615-9023/v40n3.12921.