Verma, Vinod Kumar, and Ram Alpana. “Development of Piroxicam Loaded SLN-Based Hydrogel for Transdermal Delivery”. International Journal of Pharmaceutical Sciences and Nanotechnology(IJPSN), vol. 7, no. 1, Feb. 2014, pp. 2238-45, doi:10.37285/ijpsn.2014.7.1.4.