Özel, A., İslim Koşar, T. Demirbilek, and K. Erden. “Changes in Yields and Volatile Oil Composition of Fennel (Foeniculum Vulgare Mill.) in High Plant Populations”. Italian Journal of Agronomy, Vol. 14, no. 3, July 2019, pp. 147-52, doi:10.4081/ija.2019.1347.