Corrispondenza con Federigo Enriques e Gino Fano

Enriques - 1892 Enriques - 1893 Enriques - 1894 I sem Enriques - 1894 II sem
Enriques - 1895 I sem Enriques - 1895 II sem Enriques - 1896 Enriques - 1897
Enriques - 1898 Enriques - 1899 Enriques - 1900 Enriques - 1901
Enriques - 1902 Enriques - 1903 Enriques - 1904 Enriques - 1905
Enriques - 1906 Enriques - 1908 Enriques - 1914 Enriques - 1919
Fano