[http://www.ingentaconnect.com/content/jbp/hl/2010/00000037/00000003/art00003]* Krupnik, Igor and Müller-Wille, Ludger (2010).
[http://www.ingentaconnect.com/content/jbp/hl/2010/00000037/00000003/art00003]* Krupnik, Igor and Müller-Wille, Ludger (2010).