@misc{gigl_2021_5418795, author = {Gigl, Thomas and IAU, OAE}, title = {Winter Haloes, by Thomas Gigl, Germany}, month = sep, year = 2021, publisher = {Zenodo}, doi = {10.5281/zenodo.5418795}, url = {https://doi.org/10.5281/zenodo.5418795} }