@article{GDZPPN002490374,
title = {Generalizing Hopf and Lax-Oleinik Formulae via Conjugate Integral.},
journal = {Monatshefte f\"ur Mathematik},
volume = {123},
year = {1997},
pages = {343-364},
zbl = {0895.49016},
url = {http://dml.mathdoc.fr/item/GDZPPN002490374}
}
Silin, Dmitry B. Generalizing Hopf and Lax-Oleinik Formulae via Conjugate Integral.. Monatshefte für Mathematik, Tome 123 (1997) pp. 343-364. http://gdmltest.u-ga.fr/item/GDZPPN002490374/