Economic flows between Helsinki-Uusimaa and Tallinn-Harju regions : 01/2013 : Helsinki-Tallinn Transport and Planning Scenarios project, H-TTransPlan [Electronic resource]Laakso, Seppo; Kostiainen, Eeva; Kalvet, Tarmo; Velström, Keio2013 http://www.hel.fi/wps/wcm/connect/15e9d665-795c-4429-91c9-af5abdb63d8e/Helsinki-Tallinna+talousvirrat.pdf?MOD=AJPERES&CACHEID=15e9d665-795c-4429-91c9-af5abdb63d8e