@article{1183743735,
author = {MacPherson, Dugald and Schmerl, James H.},
title = {Binary Relational Structures Having Only Countably Many Nonisomorphic Substructures},
journal = {J. Symbolic Logic},
volume = {56},
number = {1},
year = {1991},
pages = { 876-884},
language = {en},
url = {http://dml.mathdoc.fr/item/1183743735}
}
MacPherson, Dugald; Schmerl, James H. Binary Relational Structures Having Only Countably Many Nonisomorphic Substructures. J. Symbolic Logic, Tome 56 (1991) no. 1, pp. 876-884. http://gdmltest.u-ga.fr/item/1183743735/