Non-Native Forest Tree Species in Europe: The Question of Seed Origin in Afforestation oleh Paraskevi Alizoti, Jean-Charles Bastien, Debojyoti Chakraborty, Marcin Miroslav Klisz, Johan Kroon, Charalambos Neophytou, Silvio Schueler, Marcela van Loo, Marjana Westergren, Monika Konnert, Vlatko Andonovski, Kjell Andreassen, Peter Brang, Robert Brus, Branislav Cvjetković, Martina Đodan, Manuel Fernández, Josef Frýdl, Bo Karlsson, Zsolt Keserű, Andrej Kormutak, Vasyl Lavnyy, Tiit Maaten, Bill Mason, Georgeta Mihai, Cristina Monteverdi, Sanja Perić, Krasimira Petkova, Emil Borissov Popov, Matti Rousi, Srđan Milenko Stojnić, Ivaylo Tsvetkov