1. Basic statistics of the Slovak Republic, 2013
2. As geographic location, Northwest Region is bordered to the West by the two regions of the Hungarian: Northern Great Plain and Southern Great Plain, with a common border of 265 km, and North of Ukraine, Western Ukraine region, the Romanian-Ukrainian border stretching -it a length of 258 km 74 . According to the Population and Housing Census provided by 2011, the population was 2,600,132 people, representing 12.92 % of the population -20,121,641 inhabitants, which causes regional population density of 76;West Region has an area of 34,160 km 2 , representing 14.3 % of the Romanian territory, ranking 4 th nationally on the surface respectively ranked 29 among the 271 regions of the European Union
3. Statistical Atlas of Southern Counties; Listing and Analysis of Socio-Economic Indices of 1104 Southern Counties.