@article{DBLP:journals/iandc/Brandt86,
author = {Ulrike Brandt},
title = {The Position of Index Sets of Identifiable Sets in the Arithmetical
Hierarchy},
journal = {Information and Control},
volume = {68},
number = {1-3},
year = {1986},
pages = {185-195},
ee = {http://dx.doi.org/10.1016/S0019-9958(86)80034-1},
bibsource = {DBLP, http://dblp.uni-trier.de}
}