@book{Salim2009,
author = {Salim, Claudia},
year = {2009},
isbn = {3-938369-98-1},
language = {eng},
copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen},
title = {Optional linear input prices in vertical relations},
url = "http://dx.doi.org/10.17169/FUDOCS_document_000000002546",
}