Analysis of information sources in references of the Wikipedia article "Helsinki" in English language version.
Helsinki's main bilateral city partners are St. Petersburg, Tallinn, Stockholm and Berlin. In addition, Helsinki maintains special long-term partnerships with Beijing and Moscow. Helsinki has no official sister cities. Helsinki primarily works with other capitals.
Saga of Olaf Haraldson. See chapter 8: The Third Battle.
Helsinki's main bilateral city partners are St. Petersburg, Tallinn, Stockholm and Berlin. In addition, Helsinki maintains special long-term partnerships with Beijing and Moscow. Helsinki has no official sister cities. Helsinki primarily works with other capitals.