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Susto, G. A.; Johnston, A. B.; O'Hara, P. G.; McLoone, S. (2013-08-01). "Virtual metrology enabled early stage prediction for enhanced control of multi-stage fabrication processes". 2013 IEEE International Conference on Automation Science and Engineering (CASE). pp. 201–206. doi:10.1109/CoASE.2013.6653980. ISBN978-1-4799-1515-6. S2CID15432891.