@article{SIGMA_2020_16_a25,
     author = {Luca Battistella and Francesca Carocci and Cristina Manolache},
     title = {Virtual {Classes} for the {Working} {Mathematician}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2020},
     volume = {16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2020_16_a25/}
}