Torrey 1988, pp. 221–228. Torrey, Eliza Shaw (1988). "On the Trail of John Torrey, #10". Bulletin of the Torrey Botanical Club. 15 (3): 221–228. doi:10.2307/2995959. JSTOR2995959.
Wen 1999, pp. 421–455. Wen, Jun (1999). "Evolution of Eastern Asian and Eastern North American Disjunct Distributions in Flowering Plants". Annual Review of Ecology and Systematics. 30: 421–455. doi:10.1146/annurev.ecolsys.30.1.421. JSTOR221691.
Torrey 1988, pp. 221–228. Torrey, Eliza Shaw (1988). "On the Trail of John Torrey, #10". Bulletin of the Torrey Botanical Club. 15 (3): 221–228. doi:10.2307/2995959. JSTOR2995959.
Wen 1999, pp. 421–455. Wen, Jun (1999). "Evolution of Eastern Asian and Eastern North American Disjunct Distributions in Flowering Plants". Annual Review of Ecology and Systematics. 30: 421–455. doi:10.1146/annurev.ecolsys.30.1.421. JSTOR221691.