Conde, Elvira; Cadahía, Estrella; García-Vallejo, María Concepción; Fernández De Simón, Brígida (1998). "Polyphenolic Composition of Quercus suber Cork from Different Spanish Provenances". Journal of Agricultural and Food Chemistry. 46 (8): 3166–3171. Bibcode:1998JAFC...46.3166C. doi:10.1021/jf970863k.
Conde, Elvira; Cadahía, Estrella; García-Vallejo, María Concepción; Fernández De Simón, Brígida (1998). "Polyphenolic Composition of Quercus suber Cork from Different Spanish Provenances". Journal of Agricultural and Food Chemistry. 46 (8): 3166–3171. Bibcode:1998JAFC...46.3166C. doi:10.1021/jf970863k.