For Cephalotaxus
Atha, D. 2019. First report of Cephalotaxus harringtonia spontaneous and potentially invasive in North America. Phytoneuron 2019-40: 1-3. Published 16 October 2019. ISSN 2153 733X
Hils, M.H. 1993. Taxaceae. In Flora of North America Editorial Committee. 1993b. Flora of North America north of Mexico. Volume 2, pteridophytes and gymnosperms. Oxford Univ. Press, New York, NY. 475 pp.
Page. 1990. In Kramer, K.U., and P.S. Green. 1990. Pteridophytes and Gymnosperms. In K. Kubitzki, ed., The families and genera of vascular plants. Springer-Verlag, Berlin.
Price, R.A. 1990.a The genera of Taxaceae in the southeastern United States. J. Arnold Arb. 71: 69-91.
Tripp, K.E. 1995. Cephalotaxus: the plum yew. Arnoldia 55: 24-39.
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