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The online version of the original article can be found at https://doi.org/10.1631/FITEE.1800133
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Ghanbarpour, A., Niknafs, A. & Naderi, H. Erratum to: Efficient keyword search over graph-structured data based on minimal covered r-cliques. Front Inform Technol Electron Eng 21, 962 (2020). https://doi.org/10.1631/FITEE.18e0133
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DOI: https://doi.org/10.1631/FITEE.18e0133