by Paavo Havas, Yrjö Vasari
Published in Fennia (01.01.1999)

by Tolvanen, Anne, Laine, Kari, Pakonen, Tuulikki, Saari, Esko, Havas, Paavo
Published in Flora. Morphologie, Geobotanik, Oekophysiologie (1993)

by Havas, P, Kubin, E
Published in Annales botanici fennici (1983)

by Pietilä, Maritta, Lähdesmäki, Pekka, Pakonen, Tuulikki, Laine, Kari, Saari, Esko, Havas, Paavo
Published in Environmental pollution (1987) (1990)

by Havas, Paavo, Huttunen, Satu
Published in Biological conservation (1972)

by Huttunen, S, Havas, P, Laine, K
Published in Holarctic ecology (01.01.1981)