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APA Citation
Shallit, J. O., & Okhotin, A. (Eds.) (2015). Descriptional complexity of formal systems : 17th International Workshop, DCFS 2015, Waterloo, ON, Canada, June 25-27, 2015. Proceedings. Cham : Springer. http://access.bl.uk/ark:/81055/vdc_100073185190.0x000001