Evert, Ray Franklin and Esau, Katherine (2006) Esau's Plant anatomy: meristems, cells, and tissues of the plant body - their structure, function and development Wiley, Hoboken, New Jersey, page xv (页面存档备份,存于互联网档案馆), ISBN 0-471-73843-3
britannica.com
Exoskeleton. Encyclopædia Britannica. [2 July 2013]. (原始内容存档于2015-05-03).
Ebling, F. J. G. Integument. Encyclopædia Britannica. [2 July 2013]. (原始内容存档于2015-04-30).
doi.org
Arber, Agnes. Nehemiah Grew (1641–1712) and Marcello Malpighi (1628–1694): an essay in comparison. Isis. 1942, 34 (1): 7–16. JSTOR 225992. doi:10.1086/347742.
jstor.org
Arber, Agnes. Nehemiah Grew (1641–1712) and Marcello Malpighi (1628–1694): an essay in comparison. Isis. 1942, 34 (1): 7–16. JSTOR 225992. doi:10.1086/347742.
ncse.com
What is Homology?. National Center for Science Education. 17 October 2008 [28 June 2013]. (原始内容存档于2019-03-31).
What is Homology?. National Center for Science Education. 17 October 2008 [28 June 2013]. (原始内容存档于2019-03-31).
Exoskeleton. Encyclopædia Britannica. [2 July 2013]. (原始内容存档于2015-05-03).
Ebling, F. J. G. Integument. Encyclopædia Britannica. [2 July 2013]. (原始内容存档于2015-04-30).
Evert, Ray Franklin and Esau, Katherine (2006) Esau's Plant anatomy: meristems, cells, and tissues of the plant body - their structure, function and development Wiley, Hoboken, New Jersey, page xv (页面存档备份,存于互联网档案馆), ISBN 0-471-73843-3