@article{10_4064_cm_59_1_63_79,
     author = {Alexander S. Kechris and Alain Louveau},
     title = {Covering theorems for uniqueness and extended uniqueness sets},
     journal = {Colloquium Mathematicum},
     pages = {63--79},
     publisher = {mathdoc},
     volume = {59},
     number = {1},
     year = {1990},
     doi = {10.4064/cm-59-1-63-79},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-59-1-63-79/}
}