@article{1096901762,
author = {Cholak, Peter and Marcone, Alberto and Solomon, Reed},
title = {Reverse mathematics and the equivalence of definitions for well and better quasi-orders},
journal = {J. Symbolic Logic},
volume = {69},
number = {1},
year = {2004},
pages = { 683-712},
language = {en},
url = {http://dml.mathdoc.fr/item/1096901762}
}
Cholak, Peter; Marcone, Alberto; Solomon, Reed. Reverse mathematics and the equivalence of definitions for well and better quasi-orders. J. Symbolic Logic, Tome 69 (2004) no. 1, pp. 683-712. http://gdmltest.u-ga.fr/item/1096901762/