Saadati, F., V. Leghaei, and A. Zamani. “Environmentally Benign Copper Nanoparticles Supported on Walnut Shell As a Highly Durable Nanocatalyst for the Synthesis of Propargylamines”. Journal of the Serbian Chemical Society, vol. 82, no. 11, Dec. 2017, pp. 1211-2, doi:10.2298/JSC161221081S.