N. T. M. Yen, T. T. Thai, N. T. P. Thao, N. Nghia, and N. X. Quang, “Application of the W index of free living nematode communities for rapid assessment of sedimentary environment quality in the Sai Gon river”, VJMST, vol. 19, no. 1, pp. 79–86, Mar. 2019.