1. CRA-ING (Agricultural Engineering Research Unit of the Agriculture Research Council); Via della Pascolare, 16; 00015; Monterotondo; Rome; Italy
2. CRA-VIV (Landscaping Plants and Nursery Research Unit of the Agriculture Research Council); Via dei Fiori 8-51012; Pescia; Pistoia; Italy
3. Biosystems Engineering Department; University College Dublin; Belfield; Dublin; Ireland