Nnawuike, A. J. P., Udebuani, A. C., Chibuike, N. U., Ekene, I. C., Stanley, D. K., Odinaka, N. P., & Chukwuebuka, I. M. (2024). Ecological risk evaluation of spent engine oil pollution using earthworm and microbial bioassays. Sustinere: Journal of Environment and Sustainability, 8(1), 91–102. https://doi.org/10.22515/sustinere.jes.v8i1.382