Composition #1: Surowiec, I., Nowik, W., Trojanowicz, M. Identification of "insoluble" red dyewoods by high performance liquid chromatography-photodiode array detection (HPLC-PDA) fingerprinting. JOURNAL OF SEPARATION SCIENCE, 2004, vol. 27, no. 3, p. 209–216. DOI: 10.1002/jssc.200301612.
[
DOI link]