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academicons package Your second approach needs xelatex or lualatex to compile. If this is an option, here's a MWE. (I had to load the natbib package to avoid compiling errors.) \documentclass{ifacconf} \usepackage{natbib} \usepackage{academicons} \usepackage{xcolor} \usepackage[hidelinks]{hyperref} \definecolor{idcolor}{HTML}{A6CE39} \newcommand{\orcid}[1]...


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