Improvement of billet surface quality by ultra-high-frequency electromagnetic castingK. Ayata, T. lnoue, H. Mori, S. lshiguro, H. Nakata, T. Murakami and T. KominamiRev. Met. Paris, 98 11 (2001) 1025-1032DOI: https://doi.org/10.1051/metal:2001143