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1. Xia et al., 2011 — Xia, L., Szlavecz, K., Swan, C.M., Burgess, J.L., 2011. Inter- and intra-specific interactions of Lumbricus rubellus (Hoffmeister, 1843) and Octolasion lacteum (Örley, 1881) (Lumbricidae) and the implication for C cycling. Soil Biology and Biochemistry, 43(7): 1584-1590.
2. Xiao, 2019 — Xiao, N., 2019. Terrestrial earthworms of China. China Science Publishing & Media Ltd. (ed), Elsevier Inc. (Publisher), 419 pp.
3. Xu et al., 1990 — Xu, Z., Zhang, D., Yang, L., 1990. On a new fluorescent earthworm from China (Opisthopora: Megascolecidae, Acanthodrilinae). Acta Zootaxonomica Sinica, 15(1): 28-31. [In Chinese].
4. Xue et al., 2009 — Xue, Y., Gu, X., Wang, X., Sun, C., Xu, X., Sun, J., Zhang, B., 2009. The hydroxyl radical generation and oxidative stress for the earthworm Eisenia fetida exposed to tetrabromobisphenol A. Ecotoxicology, 18: 693-699.