Pietras, R.; Szymanska, K.; Kondej, M.; Gladysz, A.; Kowalczuk, D. Development and Validation of the HPLC Method for Varenicline Determination in Pharmaceutical Preparation. Curr. Issues Pharm. Med. Sci. 2017, 30 (3), 142-146. https://doi.org/10.1515/cipms-2017-0026.