@article{TUW-266128, author = {Pf{\"u}tzner, Helmut and Shilyashki, Georgi and Trenner, Gerald and Gerstbauer, Erich and Hamberger, Peter and Aigner, Martin}, title = {Transformer cores of mixed materials in limbs and yokes}, journal = {{CIGRE} {Science{\&}Engineering}}, year = {2017}, volume = {vol.8}, pages = {108--115} }