Paper  bibtex   

@techreport{Tantau2016,
  author    = {Till Tantau},
  title     = {{TikZ \& PGF---Manual for Version 3.0.1}},
  institution = {Universit{\"a}t zu L{\"u}beck
              -- Institut f{\"u}r Theoretische Informatik},
  date      = {2015-08-07},
  type      = {Manual},
  url = {http://metager.to/emqkh},
  annote = {http://sourceforge.net/projects/pgf/files/pgf/version3.0.1/
  https://is.gd/clCuOB},
  urldate={2017-07-16},
  editor    = {Till Tantau},
}