Transfer of pyrrolizidine alkaloids from ragwort, common groundsel and viperʼs bugloss to milk from dairy cows - Mulder, P PJ; Klijnstra, M D; Goselink, R MA; van Vuuren, A M; Cone, J W; Stoopen, G; Hoogenboom, R LAP (Food Addit Contam Part A Chem Anal Control Expo Risk Assess, 2020)