Červenčík, Karol 1992 Isolation and identification of rhododendrol and raspberry ketone from birch bark / aut. Karol Červenčík, Kvetoslava Vranková. Vranková, Kvetoslava In: 1st International Conference "Days of Axxence". -- 1. vyd.. -- 978-80-9773314-0-5 1st International Conference "Days of Axxence". -- Bratislava, : Axxence Slovakia s.r.o., 2019. -- S. 8-8.