@article{1183742103,
author = {Henson, C. Ward and Keisler, H. Jerome},
title = {On the Strength of Nonstandard Analysis},
journal = {J. Symbolic Logic},
volume = {51},
number = {1},
year = {1986},
pages = { 377-386},
language = {en},
url = {http://dml.mathdoc.fr/item/1183742103}
}
Henson, C. Ward; Keisler, H. Jerome. On the Strength of Nonstandard Analysis. J. Symbolic Logic, Tome 51 (1986) no. 1, pp. 377-386. http://gdmltest.u-ga.fr/item/1183742103/