Kallenbach, A., Coster, D., Fuchs, J. C., Guo, H. Y., Haas, G., Herrmann, A., et al. (1999). Closed divertor operation in ASDEX Upgrade and JET. Plasma Physics and Controlled Fusion, 41(Suppl. 12B), B177-B189. doi:10.1088/0741-3335/41/12B/313.