“…The role of city-forming enterprises in single-industry towns concerns scientists all over the world. This is confirmed by studies by Herrera, Torrent and Hernández in South America [14], Anas and Xiong in the USA and Canada [15], Bjornlandand Thorsrud in Norwegian [16], Korchak, Serova, Emelyanova and Yakovchuk in the Arctic [17], Sachs and Warner in Western Europe [18].…”