@book{20632, author = {Welfens, Paul J. J. and SpringerLink (Online service)}, title = {Innovations in Macroeconomics}, publisher = {Springer-Verlag Berlin Heidelberg,}, year = {2007.}, address = {Berlin, Heidelberg :}, url = {http://dx.doi.org/10.1007/978-3-540-68216-5} }