1998年

41.ISHIDA Megumi, PETERS Rob (1998) Effects of potential PAR on shoot extension in juveniles of the main tree species in a Japanese temperate forest. Ecological Research, 13:171-182.

https://esj-journals.onlinelibrary.wiley.com/doi/10.1046/j.1440-1703.1998.00255.x

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42.SAITO Maki, TAIRA Hideaki, FURUTA Yoshihiko (1998) Cytological and genetical studies on male sterility in Cryptomeria japonica D. Don. Journal of Forest Research, 3:167-173.

https://www.tandfonline.com/doi/abs/10.1007/BF02762139

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43.長谷川幹夫 (1998) 多雪地のスギ造林地に侵入したウダイカンバの消長に及ぼす下刈り，除伐の影響. 日本林学会誌, 80:223-228.

https://www.jstage.jst.go.jp/article/jjfs1953/80/3/80_3_223/_article