Singh, Balvinder. “Interaction Study of Co-Crystallization or Salt Formation Between 5-Hydroxyisophthalic Acid and 4,4″-Bipyridine Using NMR and Powder X-Ray Diffraction”. Asian Journal of Chemistry 33, no. 12 (December 6, 2021): 3103–3107. Accessed May 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/33_12_29.