Yongqing, Su, He Yongfu, Li Cong, Wang Ping, Zhong Yun, Liu Limei, and He Fei. 2010. “Microwave-Assisted Synthesis and Spectral Identification of [Rmim]PF6 (R = p,b,c6) Ionic Liquids”. Asian Journal of Chemistry 23 (1):97-99. https://asianpubs.org/index.php/ajchem/article/view/10101.