Cowei, Annete L., Adriana E. Downie, Brendan H. George, Bhupinder‑Pal Singh, Lukas Van Zwieten, and Deborah O’Connell. “Is Sustainability Certification for Biochar the Answer to Environmental Risks?”. Pesquisa Agropecuaria Brasileira 47, no. 5 (June 15, 2012): 637–648. Accessed November 13, 2025. https://apct.sede.embrapa.br/pab/article/view/12888.