Abietane and pimarane diterpene acid evolution in Scots pine Pinus sylvestris needles in relation to feeding of the pine sawfly, Diprion pini L L Buratti, JP Allais, C Geri and M BarbierAnn. For. Sci., 47 2 (1990) 161-171DOI: https://doi.org/10.1051/forest:19900207