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Abascal, Kathy; Yarnell, Eric (June 2002). "Butcher's Broom: Herb's Potentials Too-Often Swept Under the Rug". Alternative and Complementary Therapies. 8 (3): 177–185. doi:10.1089/107628002760091038. ISSN1076-2809.
Herrmann, Josef M.; Untergehrer, Monika; Jürgenliemk, Guido; Heilmann, Jörg; König, Burkhard (2014-04-08). "Synthesis of Phenyl-1-benzoxepinols Isolated from Butcher's Broom and Analogous Benzoxepines". European Journal of Organic Chemistry. 2014 (15): 3170–3181. doi:10.1002/ejoc.201400004. ISSN1434-193X.