@article{1183744750, author = {Yang, Yue}, title = {The Thickness Lemma From $P\_- + I\sum\_1 + \urcorner B\sum\_2$}, journal = {J. Symbolic Logic}, volume = {60}, number = {1}, year = {1995}, pages = { 505-511}, language = {en}, url = {http://dml.mathdoc.fr/item/1183744750} }
Yang, Yue. The Thickness Lemma From $P_- + I\sum_1 + \urcorner B\sum_2$. J. Symbolic Logic, Tome 60 (1995) no. 1, pp. 505-511. http://gdmltest.u-ga.fr/item/1183744750/