H. F. M. Hussien, R. K. Naji, and A. A. Majeed, “The dynamics of nutrient, toxic phytoplankton, nontoxic phytoplankton and zooplankton model”, IJAMR, vol. 5, no. 1, pp. 48–62, Feb. 2016, doi: 10.14419/ijamr.v5i1.5427.