Liang, N.-N., et al. “Optimization of Sample Preparation and Phloroglucinol Analysis of Marselan Grape Skin Proanthocyanidins Using HPLC-DADESI- MS MS”. South African Journal of Enology and Viticulture, vol. 33, no. 1, Nov. 2016, pp. 122-31, doi:10.21548/33-1-1314.