↑ (en) A.D. McKown, R.A. Stockey et C.E. Schweger, «A New Species of Pinus Subgenus Pinus Subsection Contortae From Pliocene Sediments of Ch'ijee's Bluff, Yukon Territory, Canada», International Journal of Plant Sciences, vol.163, no4, , p.687–697 (DOI10.1086/340425, lire en ligne)