Effects of epidermal/dermal separation methods and ester chain configuration on the bioconversion of a homologous series of methotrexate dialkyl esters in dermal and epidermal homogenates of hairless mouse skin James, J. Fort; Ashim, K. Mitra International Journal of Pharmaceutics 102(1-3): 241-247 1994 https://eurekamag.com/research/062/375/062375006.php