Template:Smith, Rothwell & Stockey, 2003
- Smith, S.Y., Rothwell, G.W., & Stockey, R.A. 2003. Cyathea cranhamii sp. nov. (Cyatheaceae), anatomically preserved tree fern sori from the Lower Cretaceous of Vancouver Island, British Columbia. American Journal of Botany 90(5): 755–760. JSTOR