Yingxi  Lu, Liu, Liang , Foo, Wan Ling, Magdassi, Shlomo , Mandler, Daniel , and Lee, Pooi See. 2013. ?Self-Assembled Polymer Layers Of Linear Polyethylenimine For Enhancing Electrochromic Cycling Stability.?. J. Mater. Chem. Cjournal Of Materials Chemistry C: Materials For Optical And Electronic Devices, 1, Pp. 3651 - 3654.