@article{1028999134,
author = {Stoddart, A. W. J.},
title = {The shape of level surfaces of harmonic functions in three dimensions.},
journal = {Michigan Math. J.},
volume = {11},
number = {1},
year = {1964},
pages = { 225-229},
language = {en},
url = {http://dml.mathdoc.fr/item/1028999134}
}
Stoddart, A. W. J. The shape of level surfaces of harmonic functions in three dimensions.. Michigan Math. J., Tome 11 (1964) no. 1, pp. 225-229. http://gdmltest.u-ga.fr/item/1028999134/