@article{SIGMA_2014_10_a28,
     author = {Micha{\l} Eckstein},
     title = {On {Projections} in the {Noncommutative} {2-Torus} {Algebra}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2014},
     volume = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2014_10_a28/}
}