@article{DBLP:journals/jacm/Cryer70,
author = {Colin W. Cryer},
title = {On the Approximate Solution of Free Boundary Problems Using
Finite Differences},
journal = {J. ACM},
volume = {17},
number = {3},
year = {1970},
pages = {397-411},
ee = {http://doi.acm.org/10.1145/321592.321593},
bibsource = {DBLP, http://dblp.uni-trier.de}
}