@article{01348678,
title = {On geometrical properties of free boundaries in the Hele-Shaw flow moving boundary problem.},
journal = {Lobachevskii Journal of Mathematics},
volume = {1},
year = {1998},
pages = {3-13},
zbl = {0939.76025},
language = {en},
url = {http://dml.mathdoc.fr/item/01348678}
}
Hohlov, Yu.E.; Prokhorov, D.V.; Vasil'ev, A.Ju. On geometrical properties of free boundaries in the Hele-Shaw flow moving boundary problem.. Lobachevskii Journal of Mathematics, Tome 1 (1998) pp. 3-13. http://gdmltest.u-ga.fr/item/01348678/