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Byers JA, Birgersson G, Löfqvist J, Appelgren M, Bergström G (March 1990). “Isolation of pheromone synergists of bark beetle,Pityogenes chalcographus, from complex insect-plant odors by fractionation and subtractive-combination bioassay”. 《Journal of Chemical Ecology》 16 (3): 861–876. doi:10.1007/BF01016496. PMID24263601. S2CID226090.
Byers JA, Birgersson G, Löfqvist J, Appelgren M, Bergström G (March 1990). “Isolation of pheromone synergists of bark beetle,Pityogenes chalcographus, from complex insect-plant odors by fractionation and subtractive-combination bioassay”. 《Journal of Chemical Ecology》 16 (3): 861–876. doi:10.1007/BF01016496. PMID24263601. S2CID226090.