@article{02154083,
title = {Hyperarithmetical Boolean algebras with a distinguished ideal.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {45},
year = {2004},
pages = {963-976},
zbl = {1061.03042},
language = {en},
url = {http://dml.mathdoc.fr/item/02154083}
}
Alaev, P.E. Hyperarithmetical Boolean algebras with a distinguished ideal.. Sibirskij Matematicheskij Zhurnal, Tome 45 (2004) pp. 963-976. http://gdmltest.u-ga.fr/item/02154083/