J. Petreska Stanoeva, D. Bagashovska, and M. Stefova, “Characterization of urinary bioactive phenolic metabolites excreted after consumption of a cup of mountain tea (Sideritis scardica) using liquid chromatography – tandem mass spectrometry”, Maced. J. Chem. Chem. Eng., vol. 31, no. 2, pp. 229–243, Dec. 2012.