@misc
{TN_libero_mab2,
author = {
van Dijk, Theon
},
title = {
Patent Height and Competition in Product Improvements
},
publisher = {Blackwell Publishers},
isbn = {0022-1821},
isbn = {1467-6451},
year = {1996},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}