Journal of Applied Analysis. Berlin, Boston: De Gruyter. Web. Retrieved 23 May. 2013, from http://www.degruyter.com/view/j/jaa

Journal of Applied Analysis. Berlin, Boston: De Gruyter. Retrieved 23 May. 2013, from http://www.degruyter.com/view/j/jaa

Journal of Applied Analysis. Berlin, Boston: De Gruyter. Retrieved 23 May. 2013, from http://www.degruyter.com/view/j/jaa