$a Kp. Colonisation of a burned mountain-birch forest by ants (Hymenoptera, Formicidae) in subarctic Finland / Pekka Punttila, Seppo Koponen, Michael Saaristo. - Warszawa, 1994 (Memorabilia Zoologica ; 48)
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$a Strona University of Turku, 25.05.2012 $u http://www.sci.utu.fi/tiedostot/biologia/elainmuseo/saaristo_eng.htm