K. Jeet Singh, Rothwell, G. W., Mapes, G., and Chandra, S., ?Reinvestigation of the coniferophyte morphospecies Buriadia heterophylla Seward and Sahni, with reinterpretation of vegetative diversity and putative seed attachments?, Review of Palaeobotany and Palynology, vol. 127, no. 1-2, pp. 25-43, 2003.