van der Valk, Jan M.A. 2019. “Garuda 5 (khyung lnga): Ecologies of Potency and the Poison-Medicine Spectrum of Sowa Rigpa’s Renowned ‘Black Aconite’ Formula”. HIMALAYA - The Journal of the Association for Nepal and Himalayan Studies 39 (1):111-28. https://doi.org/10.2218/himalaya.2019.7880.