Before Gustavus Adolphus captured Riga : Jan Siciński’s expedition to Estonia in 1618. A political and military case study - Balcerek, Mariusz (. Journal of Baltic studies. - London [u.a.] : Routledge, part of the Taylor & Francis Group, 1972-. - Online-Ressource. - ISSN 1751-7877 55, 2024)