@article{articled66e934e,
title   = {Identifying the borders of mathematical knowledge},
author = {Silva, Filipi Nascimento and Travençolo, Bruno A. N. and Viana, Matheus P. and Costa, Luciano da Fontoura},
year = {2010},
doi = {10.1088/1751-8113/43/32/325202},
journal   = {Journal of Physics A}
}