7Estrella Gomez-herrera,Bertin Martens,Geomina Turlea. the drivers and impediments for cross-border e-commerce in the EU [R]. Bruxelles:EU, 2013.
8Stojkov Borislav,Nikolov Ana.Cultural cross-border co-operation among Balkan's countries with the case of Serbia and Bulgaria[J].Glasnik Srpskog Geografskog Dra(s)tva,2008:882.
9Hop G E,Mourits M C M,Oude Lansink A G J M,Saatkamp H W.Cross-border Collaboration in the Field of Highly Contagious Livestock Diseases:A General Framework for Policy Support.[J].Transboundary and emerging diseases,2012.
10Hop G E,Mourits M C M,Slager R,Oude Lansink A G J M,Saatkamp H W.Prospects for cost reductions from relaxing additional cross-border measures related to livestock trade.[J].Preventive Veterinary Medicine,2012.
