@article{1183745585, author = {Koepke, Peter}, title = {Extenders, Embedding Normal Forms, and the Martin-Steel-Theorem}, journal = {J. Symbolic Logic}, volume = {63}, number = {1}, year = {1998}, pages = { 1137-1176}, language = {en}, url = {http://dml.mathdoc.fr/item/1183745585} }
Koepke, Peter. Extenders, Embedding Normal Forms, and the Martin-Steel-Theorem. J. Symbolic Logic, Tome 63 (1998) no. 1, pp. 1137-1176. http://gdmltest.u-ga.fr/item/1183745585/