@misc
{TN_libero_mab2,
author = {
Schubert, Franz
Haefliger, Andreas
},
title = {
Impromptus op. 90 & op. 142
},
publisher = {Sony Music Entertainment},
keywords = {
CD
},
year = {[1993]},
address = {
Frankfurt (Main)
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}