Please cite the following references when using the Environ module for scientific publications: 

O. Andreussi, I. Dabo and N. Marzari, “Revised self-consistent continuum solvation in electronic structure calculations”,
J. Chem. Phys., 136, 064102 (2012), ​http://dx.doi.org/10.1063/1.3676407​​.

P. Giannozzi, O. Andreussi, et. al, “Advanced capabilities for materials modelling with QUANTUM ESPRESSO”,
J. Phys.-Condens. Mat., 29, 465901 (2017), https://doi.org/10.1088/1361-648X/aa8f79.