@article{1077471944,
author = {Beckenbach, E. F.},
title = {Conjugate harmonic functions},
journal = {Duke Math. J.},
volume = {10},
number = {1},
year = {1943},
pages = { 335-339},
language = {en},
url = {http://dml.mathdoc.fr/item/1077471944}
}
Beckenbach, E. F. Conjugate harmonic functions. Duke Math. J., Tome 10 (1943) no. 1, pp. 335-339. http://gdmltest.u-ga.fr/item/1077471944/