A. Nielsen, A. Brandlmaier, M. Althammer, W. Kaiser, M. Opel, J. Simon, W. Mader, S. T. B. Goennenwein, R. Gross: All oxide ferromagnet/semiconductor epitaxial heterostructures. 2008Applied Physics Letters: 93. ISBN 0003-6951 http://dx.doi.org/10.1063/1.2998576