Dos Reis G.S., de Oliveira H.P., Larsson S.H., Thyrel M., Lima E.C. A short review on the electrochemical performance of hierarchical and nitrogen-doped activated biocarbon-based electrodes for supercapacitors. 2021. Nanomaterials. 11. 2. 424. 1-17. 10.3390/nano11020424.