@article{1183742920,
author = {Lubarsky, Robert S.},
title = {Sacks Forcing Sometimes Needs Help to Produce a Minimal Upper Bound},
journal = {J. Symbolic Logic},
volume = {54},
number = {1},
year = {1989},
pages = { 490-498},
language = {en},
url = {http://dml.mathdoc.fr/item/1183742920}
}
Lubarsky, Robert S. Sacks Forcing Sometimes Needs Help to Produce a Minimal Upper Bound. J. Symbolic Logic, Tome 54 (1989) no. 1, pp. 490-498. http://gdmltest.u-ga.fr/item/1183742920/