@book
{TN_libero_mab2,
author = {
Guldberg, Alf
},
title = {
Sur une certaine classe d'equations différentielles ordinaires
},
publisher = {Dybwad},
year = {1893},
booktitle = {Forhandlinger i Videnskapsselskapet i Christiania ; 1893,18},
address = {
Christiania
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}