D. Doneva-Šapčeska, A. Dimitrovski, T. Bojadžiev, G. Milanov, and B. Vojnovski, “Free and potentially volatile monoterpenes in grape varieties from the Republic of Macedonia”, Maced. J. Chem. Chem. Eng., vol. 25, no. 1, pp. 51–56, Jun. 2006.