Valderrama, C. F., Villegas-Guzman, P., Herrera, J. P. and Silva-Agredo, J. (2023) “Biochar and metal: a systematic review and bibliometric analysis”, Ingeniería y Competitividad, 25(3), p. e–30112505. doi: 10.25100/iyc.v25i3.12505.