@article{ZhengHuChenetal.2021,
  author    = {Yan Zheng and Haiyan Hu and Dong Chen and Jun Chen and Haichun Zhang and Alexandr P. Rasnitsyn},
  title     = {New fossil records of Xyelidae (Hymenoptera) from the Middle Jurassic of Inner Mongolia, China},
  journal   = {European journal of taxonomy},
  volume    = {2021},
  number    = {733},
  pages     = {146 -- 159},
  doi       = {10.5852/ejt.2020.800},
  year      = {2021},
}