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APA Citation
Echahed, R., & Minas, M. (Eds.) (2016). Graph transformations : 9th International Conference, ICGT 2016 in memory of Hartmut Ehrig, held as part of STAF 2016, Vienna, Austria, July 5-6, 2016. Switzerland : Springer. http://access.bl.uk/ark:/81055/vdc_100071267050.0x000001