[245] Artari 1899.

[246] Etard and Bouilhac 1898.

[247] Radais 1900.

[248] Artari 1901.

[249] Chodat 1913.

[250] Treboux 1905.

[251] Marshall Ward 1884.

[252] Uhlir 1915.

[253] Tobler 1911.

[254] Zopf 1907.