Vijay V, Shreedhar S, Adlak K, Payyanad S, Sreedharan V, Gopi G, van der Voort TSophia, Malarvizhi P, Yi S, Gebert J et al..  2021.  Review of Large-Scale Biochar Field-Trials for Soil Amendment and the Observed Influences on Crop Yield Variations. Frontiers in Energy Research. 9:21.