Research for the lichen Usnea barbata metabolites.
Bazarnova Y, Politaeva N, Lyskova N.
Z Naturforsch C. 2018 Jul 26;73(7-8):291-296. doi: 10.1515/znc-2017-0177.

Secondary Metabolite Profiling of Species of the Genus Usnea by UHPLC-ESI-OT-MS-MS.
Salgado F, Albornoz L, Cortéz C, Stashenko E, Urrea-Vallejo K, Nagles E, Galicia-Virviescas C, Cornejo A, Ardiles A, Simirgiotis M, García-Beltrán O, Areche C.
Molecules. 2017 Dec 27;23(1). pii: E54. doi: 10.3390/molecules23010054.

Protective effects of lichen metabolites evernic and usnic acids against redox impairment-mediated cytotoxicity in central nervous system-like cells.
Fernández-Moriano C, Divakar PK, Crespo A, Gómez-Serranillos MP.
Food Chem Toxicol. 2017 Jul;105:262-277. doi: 10.1016/j.fct.2017.04.030.

Detection of herbaceous-plant pararetrovirus in lichen herbarium samples.
Petrzik K, Koloniuk I, Sarkisová T, Číhal L.
Acta Virol. 2016 Jun;60(2):196-200.

Evaluation of Anticancer and Antioxidant Activity of a Commercially Available CO2 Supercritical Extract of Old Man's Beard (Usnea barbata).
Zugic A, Jeremic I, Isakovic A, Arsic I, Savic S, Tadic V.
PLoS One. 2016 Jan 8;11(1):e0146342. doi: 10.1371/journal.pone.0146342

Metabolites of Toxigenic Fungi in Lichens of Genera Alectoria, Bryoria, Evernia, Pseudevernia, and Usnea.  
Burkin AA, Kononenko GP.
Izv Akad Nauk Ser Biol. 2015 Jul-Aug;(4):361-7

Usnea barbata CO2-supercritical extract in alkyl polyglucoside-based emulsion system: contribution of Confocal Raman imaging to the formulation development of a natural product.
Zugic A, Lunter DJ, Daniels R, Pantelic I, Tasic Kostov M, Tadic V, Misic D, Arsic I, Savic S.
Pharm Dev Technol. 2016 Aug;21(5):563-75. doi: 10.3109/10837450.2015.1026606.

Application of molecular markers to detect DNA damage caused by environmental pollutants in lichen species.
Cansaran-Duman D, Altunkaynak E, Aslan A, Büyük I, Aras S.
Genet Mol Res. 2015 May 4;14(2):4637-50. doi: 10.4238/2015.May.4.23.

Genotoxic and antigenotoxic potentials of two Usnea species.
Ceker S, Orhan F, Kizil HE, Alpsoy L, Gulluce M, Aslan A, Agar G.
Toxicol Ind Health. 2015 Nov;31(11):990-9. doi: 10.1177/0748233713485889.