Paolo Cabras; Alberto Angioni; Carlo Tuberoso; Ignazio Floris; Fabiano Reniero; Claude Guillou; Stefano Ghelli (1999). “Homogentisic Acid: A Phenolic Acid as a Marker of Strawberry-Tree (Arbutus unedo) Honey”. 《J. Agric. Food Chem.》 47 (10): 4064–4067. doi:10.1021/jf990141o.