Bhattacharyya I., Bhattacharyya S. P., Talukdar S., and Medya S. “Development of Difference Spectroscopic Method for the Estimation of Aspirin in Formulation Using Hydrotropy”. International Journal of Research in Pharmaceutical Sciences, vol. 2, no. 1, Mar. 2011, pp. 84-87, https://ijrps.com/home/article/view/3063.