ZEMAN, Michal et al. Changes of endogenous melatonin and protective effect of diet containing pleuran and extract of black elder in colonic inflammation in rats. In Biologia. Section A. Section B. Section C, Botany. Zoology. Cellular and molecular biology. ISSN 0006-3088. ISSN 1335-6372. ISSN 1335-6380. ISSN 1335-6399, 2001, roč. 56, č. 6, s. 695-701.