"Botanica Marina", 20.3 (1977): 137-204. Retrieved 21 May. 2013, from http://www.degruyter.com/view/j/botm.1977.20.issue-3/issue-files/botm.1977.20.issue-3.xml

Botanica Marina (1977), 20(3), pp. 137-204. Retrieved 21 May. 2013, from http://www.degruyter.com/view/j/botm.1977.20.issue-3/issue-files/botm.1977.20.issue-3.xml

Botanica Marina. 1977. 20(3): 137-204. Retrieved 21 May. 2013, from http://www.degruyter.com/view/j/botm.1977.20.issue-3/issue-files/botm.1977.20.issue-3.xml