@article{1183743026, author = {Kechris, Alexander S. and Marker, David and Sami, Ramez L.}, title = {$\Pi^1\_1$ Borel Sets}, journal = {J. Symbolic Logic}, volume = {54}, number = {1}, year = {1989}, pages = { 915-920}, language = {en}, url = {http://dml.mathdoc.fr/item/1183743026} }
Kechris, Alexander S.; Marker, David; Sami, Ramez L. $\Pi^1_1$ Borel Sets. J. Symbolic Logic, Tome 54 (1989) no. 1, pp. 915-920. http://gdmltest.u-ga.fr/item/1183743026/