@misc
{TN_libero_mab2,
author = {
Fletcher, Suzanne W.
AND
Fletcher, Robert H.
},
title = {
Negative trials
},
publisher = {Springer Science and Business Media LLC},
isbn = {0884-8734},
isbn = {1525-1497},
keywords = {
Internal Medicine
},
year = {1987},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}