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APA Citation
Altimira, D., Mueller, F. '., Clarke, J., Lee, G., Billinghurst, M., & Bartneck, C. (2017). enhancing player engagement through game balancing in digitally augmented physical games. International journal of human-computer studies, (103), 35–47. http://access.bl.uk/ark:/81055/vdc_100045517787.0x000005