@article{1183743400,
author = {Haught, Christine Ann and Shore, Richard A.},
title = {Undecidability and Initial Segments of the (R.E.) TT-Degrees},
journal = {J. Symbolic Logic},
volume = {55},
number = {1},
year = {1990},
pages = { 987-1006},
language = {en},
url = {http://dml.mathdoc.fr/item/1183743400}
}
Haught, Christine Ann; Shore, Richard A. Undecidability and Initial Segments of the (R.E.) TT-Degrees. J. Symbolic Logic, Tome 55 (1990) no. 1, pp. 987-1006. http://gdmltest.u-ga.fr/item/1183743400/