@article{DBLP:journals/gc/ChilakamarriD95,
author = {Kiran B. Chilakamarri and
Nathaniel Dean},
title = {The Ulam number of infinite graphs},
journal = {Graphs and Combinatorics},
volume = {11},
number = {2},
year = {1995},
pages = {109-120},
ee = {http://dx.doi.org/10.1007/BF01929480},
bibsource = {DBLP, http://dblp.uni-trier.de}
}