Pejin, B., et al. “Acetylcholinesterase Inhibition Activity of a Mixture of Methylated Depsidones from the Lichen Lobaria Pulmonaria”. Asian Journal of Chemistry, vol. 24, no. 7, Mar. 2012, pp. 3261-2, https://asianpubs.org/index.php/ajchem/article/view/9350.