1. Babbar N, Oberoi HS, Uppal DS, Patil RT (2011) Total phenolic content and antioxidant capacity of extracts obtained from six important fruit residues. Food Res Intern 44:391–396
2. Baytop T (1999) Therapy with medicinal plants in Turkey; today and in future (in Turkish). Istanbul University Press, Istanbul
3. Brand-Williams W, Cuvelier ME, Berset C (1995) Use of a free radical method to evaluate antioxidant activity. LWT––Food Sci Technol 28:25–30
4. Calis I, Kirmizibekmez H, Ersoz T, Saracoglu I, Donmez Ali A, Mitova M, Handjieva N, Popov S (2002) Iridoid, phenylethanoid flavonoid glycosides from Phlomis sintenisii. Turk Acta Pharm Turc 44:195–203
5. Chang C, Yang M, Wen H, Chern J (2002) Estimation of total flavonoid content in propolis by two complementary colorimetric methods. J Food Drug Anal 10:178–182