@inproceedings(iqpl,
 author       = "G{\'a}bor Bergmann and Zolt{\'a}n Ujhelyi and Istv{\'a}n R{\'a}th and D{\'a}niel Varr{\'o}",
 year         = "2011",
 title        = "{A Graph Query Language for EMF models}",
 booktitle    = "Theory and Practice of Model Transformations, Fourth International Conference, ICMT 2011, Zurich",
 series       = "Lecture Notes in Computer Science",
 volume       = "6707",
 publisher    = "Springer",
 pages        = "167--182",
 doi          = "10.1007/978-3-642-21732-6\_12",
)
@misc(xtend,
 author       = "{Eclipse.org}",
 title        = "{Xtend - Modernized Java}",
 howpublished = "\url {http://www.eclipse.org/xtend/}",
)
@misc(eiq-hompage,
 author       = "Eclipse.org",
 year         = "2013",
 title        = "{EMF-IncQuery}",
 howpublished = "\url {http://eclipse.org/incquery/}",
)
@inproceedings(GR13,
 author       = "Pieter Van Gorp and Louis Rose",
 year         = "2013",
 title        = "{The Petri-Nets to Statecharts Transformation Case}",
 editor       = "Louis Rose Pieter Van Gorp and Christian Krause",
 booktitle    = "Sixth Transformation Tool Contest (TTC 2013)",
 series       = "EPTCS",
 volume       = "this volume",
)