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
