Ohno T, Nakade S, Nakayama K, Kitagawa J, Ueda S, Miyabe H, Masuda Y, Miyata Y. Absolute bioavailability of imidafenacin after oral administration to healthy subjects. Brit J Clinical Pharma. 2007 Aug 15;65(2):197–202. doi: 10.1111/j.1365-2125.2007.02999.x.