@article{10.30755/NSJOM.dans14.01,
     author = {Sandro Coriasco and Luigi Rodino},
     title = {Ellipticity in the {SG} calculus},
     journal = {Novi Sad Journal of Mathematics},
     pages = {5 - 30},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2015},
     doi = {10.30755/NSJOM.dans14.01},
     url = {http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.dans14.01/}
}