@article{AFM_2021_46_1_a5,
     author = {Francesca Corni},
     title = {Intrinsic regular surfaces of low codimension in {Heisenberg} groups},
     journal = {Annales Fennici Mathematici},
     pages = {79--121},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2021_46_1_a5/}
}