@article{SIGMA_2014_10_a14,
     author = {Tomasz Brzezi\'nski},
     title = {On the {Smoothness} of the {Noncommutative} {Pillow} and {Quantum} {Teardrops}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2014},
     volume = {10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2014_10_a14/}
}