@misc
{TN_libero_mab2,
author = {
Perotinus
Ficker, Rudolf von
},
title = {
Organum quadruplum "Sederunt principes"
},
publisher = {Universal-Edition},
year = {c 1930},
booktitle = {Universal-Edition ; 8211},
address = {
Wien
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}