Dörken, Veit Martin ja Jagel, Armin: Orientation and withdrawal of pollination drops in Cupressaceae s. l. (Coniferales). Flora - Morphology, Distribution, Functional Ecology of Plants, tammikuu 2014, 209. vsk, nro 1, s. 34–44. Elsevier. doi:10.1016/j.flora.2013.11.005(englanniksi)
Wolfe, Alexander P.; Tappert, Ralf; Muehlenbachs, Karlis; Boudreau, Marc; McKellar, Ryan C.; Basinger, James F. ja Garrett, Amber: A new proposal concerning the botanical origin of Baltic amber. Proceedings of the Royal Society B: Biological Sciences, lokakuu 2009, 276. vsk, nro 1672, s. 3403–3412. The Royal Society. doi:10.1098/rspb.2009.0806(englanniksi)
