@article{SIGMA_2021_17_a105,
     author = {Nikolay Bogolyubov and Cyril Malyshev},
     title = {How to {Draw} a {Correlation} {Function}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2021},
     volume = {17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a105/}
}