Chen, Fenggui, and Yuanjian Xu. “A Facile Method for the Synthesis of Benzoxazole Based Poly(2,6-Pyridinylene Benzobisoxazole)”. Asian Journal of Chemistry 27, no. 6 (March 18, 2015): 2072–2074. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/27_6_27.