Rajbangshi, Joy Chandra, et al. “Development and Validation of a RP-HPLC Method for Quantitative Analysis of Linagliptin in Bulk and Dosage Forms”. Dhaka University Journal of Pharmaceutical Sciences, vol. 17, no. 2, Dec. 2018, pp. 175-82, doi:10.3329/dujps.v17i2.39173.