Lusiana, E. D., Mahmudi, M., Musa, M., Primadhita, M. A. O., Putra, S., Silalahi, J. P., Sunadji, S. and Buwono, N. R. (2023) “Spatio-temporal analysis of the Brantas river water quality status by using principal component weighted index (PCWI)”, Ecological Questions, 34(3), pp. 1–16. doi: 10.12775/EQ.2023.028.