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\bibitem{Esteban_etal2024} {\textquotedblleft}\textit{Enhancing Electrochemical Properties of Walnut Shell Activated Carbon with Embedded MnO Clusters for Supercapacitor Applications}{\textquotedblright}. Esteban DA, Chamocho EG, Carretero Gonz{\'a}lez J, Urones Garrote E, Otero D{\'\i}az LC, Brande D{\'A}, Batteries \& Supercaps  (2024).   http://doi.org/10.1002/batt.202400101

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