author = { Kaspar, Peter AND Witzel, Herbert },

title = { Shielding effects at 17α-substituted estrogens. A tentative explanation for the low biological activity of 17α-ethyl-estradiol based on I.R. and NMR spectroscopic studies },

publisher = {Elsevier BV},

isbn = {0022-4731},

keywords = { Endocrinology , Biochemistry },

year = {1985},

url = { http://slubdd.de/katalog?TN_libero_mab2 }