@article{10_4171_dm_336,
     author = {Ugo Bruzzo and Dimitri Markushevish},
     title = {Moduli of framed sheaves on projective surfaces},
     journal = {Documenta mathematica},
     pages = {399--410},
     year = {2011},
     volume = {16},
     doi = {10.4171/dm/336},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/336/}
}