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APA Citation
Bäumer, C., Janson, M., Timmermann, B., & Wulff, J. (n.d.). collimated proton pencil-beam scanning for superficial targets: impact of the order of range shifter and aperture. Physics in medicine & biology, 63, . http://access.bl.uk/ark:/81055/vdc_100066512781.0x00005f