@article{escidoc:0719, title = {{Magnetic field optimization of permanent magnet unulators for arbitrary polarization}}, author = {Bahrdt, J. and Frentrup, W. and Gaupp, A. and Scheer, M. and Englisch, U.}, journal = {{Nuclear Instruments and Methods in Physics Research A}}, volume = {516}, pages = {575--585}, year = {2004}, doi = {} }