"Forum Mathematicum", 24.3 (2012): 445-665. Retrieved 26 May. 2013, from http://www.degruyter.com/view/j/form.2012.24.issue-3/issue-files/form.2012.24.issue-3.xml

Forum Mathematicum (2012), 24(3), pp. 445-665. Retrieved 26 May. 2013, from http://www.degruyter.com/view/j/form.2012.24.issue-3/issue-files/form.2012.24.issue-3.xml

Forum Mathematicum. 2012. 24(3): 445-665. Retrieved 26 May. 2013, from http://www.degruyter.com/view/j/form.2012.24.issue-3/issue-files/form.2012.24.issue-3.xml