Flora Brasiliensis, enumeratio plantarum in Brasilia hactenus detectarum :quas suis aliorumque botanicorum studiis descriptas et methodo naturali digestas partim icone illustratas - Martius, Karl Friedrich Philipp von, 1794 -1868 (R. Oldenbourg, 1841)

The Lower Tertiary floras of southern England - British Museum (Natural History). Department of Palaeontology. [Plants]. (1962)