@inproceedings{Babiarz:2021JG,
  author = "Babiarz, Izabela  and  Schäfer, Wolfgang  and  Szczurek, Antoni",
  title = "{Production of $\eta_c(1S,2S)$ in $\e^+ e^-$ and $p p$ collisions}",
  doi = "10.22323/1.390.0449",
  booktitle = "Proceedings of 40th International Conference on High Energy physics {\textemdash} PoS(ICHEP2020)",
  year = 2021,
  volume = "390",
  pages = "449"
}