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Hietala, A. M.; Kvaalen, H.; Schmidt, A.; Johnk, N.; Solheim, H.; Fossdal, C. G.: Temporal and spatial profiles of chitinase expression by Norway spruce in response to bark colonization by Heterobasidion annosum. Applied and Environmental Microbiology 70 (7), S. 3948 - 3953 (2004)

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