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%\cite{ning:icalepcs2021-wekl01}
\bibitem{ning:icalepcs2021-wekl01}
D.J. Ning,
\textquotedblleft{Digital Transformation of Urban Economy and Case Study}\textquotedblright,
% --- abbreviated form (UNpublished paper) - JACoW template Feb 2018 ---
presented at ICALEPCS'21, Shanghai, China, Oct. 2021, paper WEKL01, unpublished.