Bergmann, Ludwig, Clemens Schaefer and Wilhelm Raith. "10. Gasentladungen" Elektromagnetismus. Berlin, Boston: Walter de Gruyter, 2006. 613-658. Web. Retrieved 19 Jun. 2013, from http://www.degruyter.com/view/books/9783110199284/9783110199284.2.613/9783110199284.2.613.xml

Bergmann, L., Schaefer, C. & Raith, W. (2006). 10. Gasentladungen. Elektromagnetismus (pp. 613-658). Berlin, Boston: Walter de Gruyter. Retrieved 19 Jun. 2013, from http://www.degruyter.com/view/books/9783110199284/9783110199284.2.613/9783110199284.2.613.xml

Bergmann, Ludwig, Clemens Schaefer and Wilhelm Raith. 2006. 10. Gasentladungen. In Elektromagnetismus, 613-658. Berlin, Boston: Walter de Gruyter. Retrieved 19 Jun. 2013, from http://www.degruyter.com/view/books/9783110199284/9783110199284.2.613/9783110199284.2.613.xml