@article{01146283,
title = {Neumann problem in a class of harmonic functions in domains with a piecewise-Lyapunov boundary.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {12},
year = {1997},
pages = {114-121},
zbl = {0895.35027},
language = {en},
url = {http://dml.mathdoc.fr/item/01146283}
}
Kokilashvili, V.; Paatashvili, V. Neumann problem in a class of harmonic functions in domains with a piecewise-Lyapunov boundary.. Memoirs on Differential Equations and Mathematical Physics, Tome 12 (1997) pp. 114-121. http://gdmltest.u-ga.fr/item/01146283/