Attibayeba, J.-L. Badila, and O.-A. Marie Genevieve, “Changes in Endogenous Cytokinins and in vitro Photoperiodic Flowering Induction in Cichorium intybus L”., Pak. J. Nutr., vol. 9, no. 3, pp. 230–234, Feb. 2010, doi: 10.3923/pjn.2010.230.234.