Beryllium parabolic refractive X-ray lenses for full field imaging and scanning microscopy with hard X-rays B. Lengeler, C.G. Schroer, M. Kuhlmann, B. Benner, T.F. Günzler, O. Kurapova, C. Rau, T. Weitkamp, A. Simionovici, A. Snigirev and Snigireva J. Phys. IV France, 104 (2003) 221 DOI: 10.1051/jp4:200300065