Nirun Witit-anun, Prasertsak Kasemanankul, Surasing Chaiyakun and Pichet Limsuwan 2009. Structures and Optical Properties of TiO2 Thin Films Deposited on Unheated Substrate by DC Reactive Magnetron Sputtering. Agriculture and Natural Resources. 43, 5 (Dec. 2009), 340–346.