{{Cite journal| doi = 10.1364/AO.389063| volume = 59| issue = 12| pages = 3766–3772| last1 = Zimmer| first1 = A.| last2 = Gilliot| first2 = M.| last3 = Broch| first3 = L.| last4 = Boulanger| first4 = C.| last5 = Stein| first5 = N.| last6 = Horwat| first6 = D.| title = Morphological and chemical dynamics upon electrochemical cyclic sodiation of electrochromic tungsten oxide coatings extracted by in situ ellipsometry| journal = Applied Optics| date = 2020}}