Chwil, Paulina, 		Terlecki, Karol, 		Sobstyl, Jan, 		Sobstyl, Paulina, 		Kotuła, Lidia, AND 		Kocki, Janusz.
" Crataegus monogyna Jacq. and C. oxyacantha L. Medical applications of quercetin" <em>Modern Phytomorphology</em> [Online], Volume 6(1 April 2014)