Ramsay, Sophie, et al. “A Randomized, Crossover Trial Comparing the Efficacy and Safety of Fesoterodine and Extended-Release Oxybutynin in Children With Overactive Bladder With 12-Month Extension on Fesoterodine: The FOXY Study”. Canadian Urological Association Journal, vol. 14, no. 6, Jan. 2020, pp. 192-8, doi:10.5489/cuaj.6247.