Journal article (2009) - L. Song (author), GF Wang (author), Z. Q. Ou (author), ZQ Ou (author), O Haschaolu (author), O Tegus (author), O. Tegus (author), EH Bruck (author), E. H. Bruck (author), EH Brück (author), E.H. Brück (author), E.H. Bruck (author), Ekkes Bruck (author), E. Brück (author), E. H. Brück (author), Ekkes Brück (author), E. Bruck (author), K.H.J. Buschow (author)