Research on improving water quality using two experimental statistical methodsMihail Aurel Ţîţu, Andrei Victor Sandu, Costel Ceocea, Alina Bianca Pop, Ştefan Ţîţu and Alexandra Maria MatiaMATEC Web Conf., 178 (2018) 08014DOI: https://doi.org/10.1051/matecconf/201817808014