[855] Buchet 1890.

[856] Bachmann 1904.

[857] Bachmann 1911.

[858] Lang 1903.

[859] Stahlecker 1906.

[860] Bitter 1899.

[861] Zukal 1879.

[862] Kihlman 1890.

[863] Jumelle 1892.

[864] Zopf 1890, p. 489.