Liu, Song, Yanhong Yan, Weiwei Guan, Mingze Li, and Rongying Jiang. 2012. “Role of N-N Anatase-Rutile Heterojunction in the Photocatalysis of Mixed-Phase Titania”. Asian Journal of Chemistry 25 (3):1307-10. https://doi.org/10.14233/ajchem.2013.12956.