Lüders, Klaus, Gebhard von Oppen, Ludwig Bergmann, et al. "Frontmatter" Band 1 Mechanik, Akustik, Wärme. Berlin, Boston: Walter de Gruyter, 2008. I-VI. Web. Retrieved 22 May. 2013, from http://www.degruyter.com/view/books/9783110208214/9783110208214.fm/9783110208214.fm.xml

Lüders, K., Oppen, G., Bergmann, L., et al. (2008). Frontmatter. Band 1 Mechanik, Akustik, Wärme (pp. I-VI). Berlin, Boston: Walter de Gruyter. Retrieved 22 May. 2013, from http://www.degruyter.com/view/books/9783110208214/9783110208214.fm/9783110208214.fm.xml

Lüders, Klaus, Gebhard von Oppen, Ludwig Bergmann, et al. 2008. Frontmatter. In Band 1 Mechanik, Akustik, Wärme, I-VI. Berlin, Boston: Walter de Gruyter. Retrieved 22 May. 2013, from http://www.degruyter.com/view/books/9783110208214/9783110208214.fm/9783110208214.fm.xml