To cite icetea in publications use:

  Bhardwaj, V., Semplicio, G., Erdogdu, N. U., Manke, T. & Akhtar, A.
  MAPCap allows high-resolution detection and differential expression
  analysis of transcription start sites. Nat. Commun. 10, 3219 (2019)

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{MAPCap} allows high-resolution detection and differential
               expression analysis of transcription start sites},
    author = {{Bhardwaj} and {Vivek} and {Semplicio} and {Giuseppe} and {Erdogdu} and Niyazi Umut and {Manke} and {Thomas} and {Akhtar} and {Asifa}},
    journal = {Nat. Commun.},
    publisher = {Nature Publishing Group},
    volume = {10},
    number = {1},
    pages = {3219},
    month = {jul},
    year = {2019},
    language = {en},
    url = {https://www.nature.com/articles/s41467-019-11115-x},
  }