@book{Lüthen2014,
author = {Lüthen, Holger},
year = {2014},
language = {eng},
copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen},
title = {Rates of Return and Early Retirement Disincentives},
url = "http://dx.doi.org/10.17169/FUDOCS_document_000000020505",
}