Muzahir Abbas, Syed, et al. “Stretchable and Highly Conductive Carbon Nanotube-Graphene Hybrid Yarns for Wearable Systems”. EAI Endorsed Transactions on Internet of Things, vol. 2, no. 6, Dec. 2015, p. e2, https://doi.org/10.4108/eai.28-9-2015.2261421.