Acknowledgement

EPW is released under the GNU General Public License.

The use of EPW v4 in scientific publications can be acknowledged by citing the associated papers:
S. Poncé et al, Comput. Phys. Comm. (2016) (implementation)
F. Giustino, M. L. Cohen, and S. G. Louie, Phys. Rev. B 76, 165108 (2007) (methodology)

The use of the anisotropic Eliashberg modules available in EPW v4 can be acknowledged by citing:
E. R. Margine and F. Giustino, Phys. Rev. B 87, 024505 (2013)

The use of the Fröhlich correction to the electron-phonon materix elements in EPW v4 can be acknowledged by citing:
C. Verdi and F. Giustino, Phys. Rev. Lett. 115, 176401 (2015)

When using the older versions EPW v2 and EPW v3 the appropriate citation is:
J. Noffsinger et al, Comput. Phys. Comm. 181, 2140 (2010)