@article{01702852,
title = {The alternation hierarchy for the theory of },
journal = {Theory and Applications of Categories [electronic only]},
volume = {8},
year = {2001},
pages = {166-197},
zbl = {0987.03057},
language = {en},
url = {http://dml.mathdoc.fr/item/01702852}
}
Santocanale, Luigi. The alternation hierarchy for the theory of . Theory and Applications of Categories [electronic only], Tome 8 (2001) pp. 166-197. http://gdmltest.u-ga.fr/item/01702852/