1. Tao, F., Zhang, M. & Nee, A. Y. C. Digital Twin Driven Smart Manufacturing (Academic Press, 2019).
2. Pettey, C. ‘Prepare for the impact of digital twins’ (2017). Gartner report available at
https://go.nature.com/2krzbjd
3. Kusiak, A. Nature 544, 23–25 (2017).