Inactivation of Giardia intestinalis cysts in water using a sonochemical method based on mid-high-frequency waves oleh Laura María Gómez-Quintero, Marlon Alexis Múnera-Marín, María Alejandra Urán-Serna, Efraím A. Serna-Galvis, Ana Luz Galván-Diaz, Ricardo A. Torres-Palma