@software{elio_campitelli_2020_3970232, author = {Elio Campitelli}, title = {{ggnewscale: Multiple Fill and Color Scales in ggplot2}}, month = aug, year = 2020, publisher = {Zenodo}, version = {v0.4.2}, doi = {10.5281/zenodo.3970232}, url = {https://doi.org/10.5281/zenodo.3970232} }