For Liriodendron
Fetter, K.C. 2014. Migration, adaptation, and speciation – a post-glacial history of the population structure, phylogeography, and biodiversity of Liriodendron tulipifera L. (Magnoliaceae). M.S. Thesis, Dept. of Biology, University of North Carolina at Chapel Hill. 101 pp.
Fetter, K.C., A.S. Weakley, and D.B. Poindexter. [in prep.]. Taxonomy of eastern North American Liriodendron (Magnoliaceae).
Fetter, K.C., and A.S. Weakley. 2019. Reduced gene flow from mainland populations of Liriodendron tulipifera into the Florida peninsula promotes diversification. International Journal of Plant Sciences 180(3): 253-269.
Nooteboom In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp.