Implementing a sustainable integrated agroforestry system for the cultivation of Ilex paraguariensis oleh Luis R. Comolli, Esteban Schegg, Cristian Infuleski, Nestor Munareto, Hugo Fassola, Alejandra von Wallis, Nardia M. Bulfe, Paola González, Sara R. Barth, María Elena Gauchat, Fabio Wyss