$bf Delta^1_3$-sets of reals

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@article{3d6df044fd3b4c8ab917c2292378cb57,

title = "\$bf Delta\textasciicircum{}1\_3\$-sets of reals",

author = "Haim Judah and Saharon Shelah",

year = "1993",

doi = "10.2307/2275325",

language = "אנגלית",

volume = "58",

pages = "72--80",

journal = "Journal of Symbolic Logic",

issn = "0022-4812",

publisher = "Cambridge University Press",

number = "1",

}