At: Paläontologische Zeitschrift, 10, 3-4 By: Irgang E.
journalAt: Feddes Repertorium, 109, 5-6 By: Süss H., Velitzelos E.
journalAt: Journal of the Botanical Research Institute of Texas, 14, 1 By: Chambers K. L., Poinar G. O.
journalAt: Botanical Magazine, 92, 1027 By: Nishida H., Nishida M.
journalAt: Chenia, 14 By: Yu N.-N., Gradstein S. R., Narengaowa
journalAt: Review of Palaeobotany and Palynology, 210 By: Wang S.-J., Hilton J., Galtier J., He X.-Y., Shao L.-Y.
journalAt: Journal of the Botanical Research Institute of Texas, 8, 2 By: Chambers K. L., Poinar G. O.
bookAt: Rept. 21 Sess., Inter. Geol. Congr., Copenhagen, Det Berlingske Bogtrykkeri, 6 By: Krutzsch W., Pchalek J., Spiegler D.
journalAt: Zeitschrift für Botanik, 5, 9 By: Solms-Laubach H.
journalAt: Chinese science bulletin, 51, 21 By: Wang J.