Chú thích Bộ_Thông

  1. ↑ Christenhusz, Maarten J.M.; Reveal, James L.; Farjon, Aljos; Gardner, Martin F.; Mill, Robert R.; Chase, Mark W. (2011). “A new classification and linear sequence of extant gymnosperms” (PDF). Phytotaxa 19: 55–70. 
  2. ↑ Zip code Zoo
  3. ↑ A. Bresinsky, Ch. Körner, J. W. Kadereit, G. Neuhaus, U. Sonnewald: Strasburger – Lehrbuch der Botanik. 36. Auflage, Spektrum Akademischer Verlag, Heidelberg 2008. ISBN 978-3-8274-1455-7, S. 836 ff.
  4. ↑ Thomas N. Taylor, Edith L. Taylor, Michael Krings: Paleobotany. The Biology and Evolution of Fossil Plants. Second Edition, Academic Press 2009, ISBN 978-0-12-373972-8, S. 805ff