KAMMANN, C.; IPPOLITO, J.; HAGEMANN, N.; BORCHARD, N.; CAYUELA, M. L.; ESTAVILLO, J. M.; FUERTES-MENDIZABAL, T.; JEFFERY, S.; KERN, J.; NOVAK, J.; RASSE, D.; SAARNIO, S.; SCHMIDT, H.-P.; SPOKAS, K.; WRAGE-MÖNNIG, N. Biochar as a tool to reduce the agricultural greenhouse-gas burden – knowns, unknowns and future research needs. Journal of Environmental Engineering and Landscape Management, v. 25, n. 2, p. 114-139, 27 Apr. 2018.