Investigating a surface water quality monitoring approach for QwaQwa, South Africa, by combining biological in vitro tests and chemical analyses - Avenant, Marinda; Börnick, Hilmar; Graumnitz, Stephanie; Nyoka, Ngitheni; Opeolu, Beatrice; Voua Otomo, Patricks; Schubert, Annika; Schubert, Sara; Vos, Tascha; Jungmann, Dirk (Frontiers in Water, 2024)