“…On the other hand, EF research studies include attempts to further development of the methodology per se (Kitzes et al, 2007, Ewing et al, 2010 as well as to link EF and sustainability schemes (Cucek et al 2012, Valada, 2010. Some studies also concerned the EF of particular systems, such as waste streams (Herva et al, 2010), nectarine production (Cerutti et al, 2010), swine manure fertilization in orchard (Cerutti et al,2011) fruit production systems (Cerutti et al, 2013), and even municipalities (Buratti et al, 2009). To the knowledge of the authors only Millan et al (2010) conducted a study regarding the EF of a sea port, whereas no previous study is found in the literature with the aim to link the environmental performance of a port in terms of its EMS with its EF.…”