@article{AFM_2000_25_2_a0,
     author = {J. Bonet and C. Fern\'andez and R. Meise},
     title = {Characterization of the omega-hypoelliptic convolution operators on ultradistributions},
     journal = {Annales Fennici Mathematici},
     pages = {261--284},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2000_25_2_a0/}
}