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Franco L, Sánchez C, Bravo R, Rodriguez A, Barriga C, Juánez JC (2012). «The sedative effects of hops (Humulus lupulus), a component of beer, on the activity/rest rhythm». Acta Physiol Hung99 (2): 133-9. PMID22849837. doi:10.1556/APhysiol.99.2012.2.6.
Franco L1, Sánchez C, Bravo R, Rodríguez AB, Barriga C, Romero E, Cubero J (2012). «The sedative effect of non-alcoholic beer in healthy female nurses». PLoS One7 (7): e37290. PMID22815680. doi:10.1371/journal.pone.0037290.
Keiler AM, Zierau O, Kretzschmar G; Zierau; Kretzschmar (mayo de 2013). «Hop extracts and hop substances in treatment of menopausal complaints». Planta Medica79 (7): 576-9. PMID23512496. doi:10.1055/s-0032-1328330.
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Hu, Tao & Corey, E.J. (2002). «Short Syntheses of (±)-δ-Araneosene and Humulene Utilizing a Combination of Four-Component Assembly and Palladium-Mediated Cyclization». Organic Letters4 (14): 2441-2443. PMID12098267. doi:10.1021/ol026205p.
Franco L, Sánchez C, Bravo R, Rodriguez A, Barriga C, Juánez JC; Sánchez; Bravo; Rodriguez; Barriga; Juánez (junio de 2012). «The sedative effects of hops (Humulus lupulus), a component of beer, on the activity/rest rhythm». Acta Physiologica Hungarica99 (2): 133-9. PMID22849837. doi:10.1556/APhysiol.99.2012.2.6.
Franco L, Sánchez C, Bravo R, Rodriguez A, Barriga C, Juánez JC (2012). «The sedative effects of hops (Humulus lupulus), a component of beer, on the activity/rest rhythm». Acta Physiol Hung99 (2): 133-9. PMID22849837. doi:10.1556/APhysiol.99.2012.2.6.
Franco L1, Sánchez C, Bravo R, Rodríguez AB, Barriga C, Romero E, Cubero J (2012). «The sedative effect of non-alcoholic beer in healthy female nurses». PLoS One7 (7): e37290. PMID22815680. doi:10.1371/journal.pone.0037290.
Keiler AM, Zierau O, Kretzschmar G; Zierau; Kretzschmar (mayo de 2013). «Hop extracts and hop substances in treatment of menopausal complaints». Planta Medica79 (7): 576-9. PMID23512496. doi:10.1055/s-0032-1328330.
Peackock, Val & Deinzer, Max (1981). «Chemistry of hop aroma in beer». Journal of the American Society of Brewing Chemists39. Archivado desde el original el 30 de diciembre de 2013.