Zoidogamy in fossil Gymnosperms: the Centenary of a concept, with special References to Predolian of Late Paleozoic Conifers
Reference:
Poort,R.J. et al. (1996)
Zoidogamy in fossil Gymnosperms: the Centenary of a concept, with special References to Predolian of Late Paleozoic Conifers National Academy of Sciences, Washington, Proceedings
Vol. 93 # 21 P. 11713-11717