@article{EJDE_2016__2016__a2,
     author = {Al-Salti, Nasser and Kerbal, Sebti},
     title = {Non-local elliptic systems on the {Heisenberg} group},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2016},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2016__2016__a2/}
}