Pengaruh penambahan konsentrasi asam sulfat pada larutan elektrolit asam oksalat 0,5 m terhadap ketebalan lapisan oksida hasil anodisasi aluminium foil = Effect of sulfuric acid addition on 0.5 m oxalic acid to the thickness of oxide layer produced by anodization of aluminium foil - Sipayung, Sandhy Putra Pangidoan, author (2008)