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Céspedes, Carlos L. (2006). «Antifungal and Antibacterial Activities of Mexican Tarragon (Tagetes lucida)». Journal of Agricultural and Food Chemistry54 (10): 3521-3527. PMID19127719. doi:10.1021/jf053071w.
Nicoletti, M.; Goulart, MO.; de Lima, RA.; Goulart, AE.; Delle Monache, F.; Marini= Bettolo, GB. (1984). «Flavonoids and alkaloids from Strychnos pseudoquina». J Nat Prod.47 (6): 953-957. PMID6533269. doi:10.1021/np50036a007.