@article{BUMI_1923_1_2_4_a4,
     author = {Dore, Paolo},
     title = {Sul teorema di {Clairaut}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {134--139},
     year = {1923},
     volume = {Ser. 1, 2},
     number = {4},
     zbl = {49.0678.01},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1923_1_2_4_a4/}
}