"Frequenz", 61.3-4 (2007): 54-104. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/freq.2007.61.3-4/issue-files/freq.2007.61.3-4.xml

Frequenz (2007), 61(3-4), pp. 54-104. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/freq.2007.61.3-4/issue-files/freq.2007.61.3-4.xml

Frequenz. 2007. 61(3-4): 54-104. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/freq.2007.61.3-4/issue-files/freq.2007.61.3-4.xml