對這個議題有興趣的學生可參考這些文章:Friedman, W.E. 2001. Developmental and evolutionary hypotheses for the origin of double fertilization and endosperm. Comptes Rendus de l'Academie des Sciences 324: 559-567. | pdf
Friedman, W.E. 1998. The evolution of double fertilization and endosperm: an "historical" perspective. Sexual Plant Reproduction 11: 6-16. | pdf
動畫一, 與影片一
