Ryter, F., Suttrop, W., Brusehaber, B., Kaufmann, M., Mertens, V., Murmann, H., Peeters, A. G., Stober, J., Schweinzer, J., Zohm, H., & ASDEX Upgrade Team (1998). H-mode power threshold and transition in ASDEX Upgrade. Plasma Physics and Controlled Fusion, 40(5), 725-729. doi:10.1088/0741-3335/40/5/032000074019100032.