Monte Carlo simulation and PMF model for assessing human health risks associated with heavy metals in groundwater: a case study of the Nubian aquifer, Siwa depression, Egypt - Eid, Mohamed Hamdy; Mikita, Viktoria; Eissa, Mustafa; Ramadan, Hatem Saad; Mohamed, Essam A.; Abukhadra, Mostafa R.; El-Sherbeeny, Ahmed M.; Bellucci, Stefano; Kovács, Attila; Szűcs, Péter (Frontiers in Earth Science, 2024)