ヴァルター・ダール
↑ Spick 1996, pp. 3–4.
↑ Caldwell & Muller 2007, p. 216.
↑ Dahl 2000, pp. 46–66
↑ Weal 1996, p. 78.
↑ Dahl 2000, p. 154-165
↑ Spick 1996, p. 230.
↑ Fellgiebel 2000, p. 156.
↑ Fellgiebel 2000, p. 96.