To cite TESS in a publication use:

H{"o}hna S. 2013. Fast simulation of reconstructed phylogenies under global time-dependent birth--death processes. Bioinformatics, 29(11) 1367-1374

Corresponding BibTeX entry:

  @Article{,
    title = {Fast simulation of reconstructed phylogenies under global
      time-dependent birth--death processes},
    author = {S. H{"o}hna},
    journal = {Bioinformatics},
    year = {2013},
    volume = {29},
    number = {11},
    pages = {1367--1374},
  }