@article{BUMI_2010_9_3_1_a1,
     author = {Hill, C. Denson and Nurowski, Pawe{\l}},
     title = {Differential {Equations} and {Para-CR} {Structures}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {25--91},
     publisher = {mathdoc},
     volume = {Ser. 9, 3},
     number = {1},
     year = {2010},
     zbl = {1206.58001},
     mrnumber = {2605912},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2010_9_3_1_a1/}
}