To cite COSG in publications use:

  Dai M, Pei X, Wang X-J (2022). Accurate and fast cell marker gene
  identification with COSG. Briefings in Bioinformatics 23(2):bbab579.
  doi:10.1093/bib/bbab579

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Accurate and fast cell marker gene identification with COSG},
    author = {Min Dai and Xiaobing Pei and Xiu-Jie Wang},
    journal = {Briefings in Bioinformatics},
    year = {2022},
    volume = {23},
    number = {2},
    pages = {bbab579},
    doi = {10.1093/bib/bbab579},
  }