P. Oker-Blom

发表

Juha Lappi, Heikki Smolander, H. Smolander, 1991 .

Heikki Smolander, H. Smolander, P. Oker-Blom, 1988, Forest Science.

Seppo Kellomäki, Juhan Ross, J. Ross, 1986 .