@misc{michaelsen_multilayer_mirror_2001, 
author={Michaelsen, C.,Wiesmann, J.,Bormamm, R.,Nowak, C.,Dieker, C.,Hollensteiner, S.,Jaeger, W.},
title={Multilayer mirror for X-rays below 190eV},
year={2001},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Michaelsen, C.; Wiesmann, J.; Bormamm, R.; Nowak, C.; Dieker, C.; Hollensteiner, S.; Jaeger, W.: Multilayer mirror for X-rays below 190eV. Optics Letters. 2001. vol. 26, no. 11, 792-794.}}