@article{1183736767, author = {Owings, James C.}, title = {$\pi^1\_1$ Sets, $\omega$-Sets, and Metacompleteness}, journal = {J. Symbolic Logic}, volume = {34}, number = {1}, year = {1969}, pages = { 194-204}, language = {en}, url = {http://dml.mathdoc.fr/item/1183736767} }
Owings, James C. $\pi^1_1$ Sets, $\omega$-Sets, and Metacompleteness. J. Symbolic Logic, Tome 34 (1969) no. 1, pp. 194-204. http://gdmltest.u-ga.fr/item/1183736767/