@article{SF_1992__45_3_135174,
     author = {A. Bobrowski},
     title = {Some remarks on the two-dimensional  {Dirac} equation.},
     journal = {Semigroup forum},
     pages = {77--91},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1992},
     zbl = {0759.60086},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135174/}
}