Crotty, F. V., Adl, S. M., Blackshaw, R. P. and Murray, P. J. 2012. Using stable isotopes to differentiate trophic feeding channels within soil food webs. Journal Of Eukaryotic Microbiology. 59 (6), pp. 520-526. https://doi.org/10.1111/j.1550-7408.2011.00608.x