CERENAK, A., KRALJ, D. and JAVORNIK, B. (2009) “Compounds of essential oils as markers of hop resistance (Humulus lupulus) to powdery mildew (Podosphaera macularis)”, Acta agriculturae Slovenica, 93(3), pp. 267–273. doi:10.14720/aas.2009.93.3.15049.