1. Arnon, D. I. (1949). Copper enzymes in isolated chloroplasts. Polyphenoloxidase in beta vulgaris. Plant Physiology, 24, 1–15.
2. Ayer, W. A., Browne, L. M., & Lovell, S. H. (1983). Biologically active phenolic metabolites of a Verticicladiella species. Phytochemistry, 22, 2267–2271.
3. Ayer, W. A., Browne, L. M., & Lin, G. (1989). Metabolites of Leptographium wageneri, the causative agent of black stain root disease of conifers. Journal of Natural Products, 52, 119–129.
4. Bai, Y.-H., Yu, H., Sun, S.-H., Xu, D.-H., & Masa, Y. A. (2008). Study on chemical constituents of Japanese herb Sonchus oleraceus. Pharmaceutical & Clinical Research, 16, 444–445.
5. Chen, H., & Tang, M. (2002). Microstructure of blue-stain fungi (Leptographium terebrantis) associated with Dendroctonus armandi in the xylem tissue of Pinus armandi. Acta Botanica Boreali–Occidentalia Sinica, 22, 1391–1395.