G. R. Smith, T. W. Crowther, N. Eisenhauer, and J. van den Hoogen, “Building a global database of soil microbial biomass and function: a call for collaboration: A CALL FOR COLLABORATION”, Soil Org, vol. 91, no. 3, pp. 139–142, Jan. 2020, doi: 10.25674/so91iss3pp140.