Babu A., R. ., Gupta, S., Nisha Rathaur, Agarwal, T. ., & Sharma, M. (2024). The effects of crowding and toxicant on biological food - chain system: a mathematical approach. Hilbert Journal of Mathematical Analysis, 2(2), 080–091. https://doi.org/10.62918/hjma.v2i2.24