D. Le Nhu, H. Nguyen Thi Mai, H. Hoang Thi Thu, T. Duong Thi, B. Phung Thi Xuan, H. Pham Thi Mai, H. Pham Thi Minh and Q. Le Thi Phuong, Faecal contamination and its relationship with some environmental variables of four urban rivers in inner Hanoi city, Vietnam , Vietnam J. Earth Sci. 46 (2023) 34–47. DOI: https://doi.org/10.15625/2615-9783/19327.