ieeexplore.ieee.org
ieeexplore.ieee.org
researchgate.net
semanticscholar.org
researchgate.net
researchgate.net
lst.tfo.upm.es
lst.tfo.upm.es
https://www.lst.tfo.upm.es › city4age
ilab.atc.gr
ilab.atc.gr
https://ilab.atc.gr › portfolio › city4age
ncbi.nlm.nih.gov
National Center for Biotechnology Information
https://www.ncbi.nlm.nih.gov › pmc › articles › PMC7170813
digital-strategy.ec.europa.eu
semanticscholar.org
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