M. ONDREJOVIČ, T. . MALIAR, H. . BENKOVIČOVÁ, and J. . KUBINCOVÁ, “Solid-Phase Extraction for Photometric Determination of Rosmarinic Acid in Lemon Balm (Melissa Officinalis) Extracts”, Nova Biotechnol. Chim., vol. 11, no. 1, pp. 62–72, Jun. 2012.