1. Cyclopia extracts act as selective estrogen receptor subtype downregulators in estrogen receptor positive breast cancer cell lines: Comparison to standard of care breast cancer endocrine therapies and a selective estrogen receptor agonist and antagonist
   Folasade R. Olayoku et al, 2023, Frontiers in Pharmacology CrossRef
2. Role of Estrogen Receptor-Positive/Negative Ratios in Regulating Breast Cancer
   Yanchu Li et al, 2022, Evidence-Based Complementary and Alternative Medicine CrossRef