van der Valk, J.M. 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 (Jul. 2019), 111–128. DOI:https://doi.org/10.2218/himalaya.2019.7880.