There is no charge upon submission.
The article publishing charge is 250/300/350 euros depending on the length of the paper. This fee includes full open access to the paper, online color figures, and the high-resolution PDF file (final published paper) that can be freely disseminated.
If the Authors are interested in having color figures printed also in the hard copy, an additional cost is requested. This cost depends on the number of figures but approximately ranges between 150 euros and 200 euros per color figure.
Authors must submit illustrations and tables that are clear both when printed in black and white in the hard copy of GFDQ and when included in the web, color version.