Bashyal, R. “Synthesis of Nanoparticles of Poly (ethyleneimine) and Their Characterization by Transmission Electron Microscopy, Thin Layer Chromatography, and Infrared Spectroscopy”. Journal of Agriculture and Forestry University, vol. 5, no. 1, Dec. 2022, pp. 293-8, doi:10.3126/jafu.v5i1.48477.