@article{SIGMA_2021_17_a94,
     author = {Teresa Crespo and Zbigniew Hajto and Rouzbeh Mohseni},
     title = {Real {Liouvillian} {Extensions} of {Partial} {Differential} {Fields}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2021},
     volume = {17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a94/}
}