Siddig, N., Ahmed, A., Saad, S., & Koua, F. (2019). Heavy metals accumulation from sewage sludge in the Nile tilapia Oreochromis niloticus (Trewavas, 1983) during a sludge-earthworm-fish short-term cycling. Italian Journal of Food Safety, 8(1). https://doi.org/10.4081/ijfs.2019.7257