@article{GDZPPN001176803,
title = {The Indicatrix Method in Free Boundary Problems.},
journal = {Numerische Mathematik},
volume = {39},
year = {1982},
pages = {39-52},
zbl = {0452.65068},
url = {http://dml.mathdoc.fr/item/GDZPPN001176803}
}
Fage, D.M. The Indicatrix Method in Free Boundary Problems.. Numerische Mathematik, Tome 39 (1982) pp. 39-52. http://gdmltest.u-ga.fr/item/GDZPPN001176803/