Polomski, J., Schönfeld, U., Braasch, H., Dobbertin, M., Burgermeister, W., & Rigling, D. (2006). Occurrence of Bursaphelenchus species in declining Pinus sylvestris in a dry Alpine valley in Switzerland. Forest Pathology, 36(2), 110-118. https://doi.org/10.1111/j.1439-0329.2006.00437.x