Nasal absorption in rats ii. effect of enhancers on insulin absorption and nasal histology Chandler, S.G.; Illum, L.; Thomas, N.W. International Journal of Pharmaceutics 76(1-2): 61-70 1991 0378-5173 10.1016/0378-5173(91)90344-n https://eurekamag.com/research/007/582/007582453.php