@phdthesis{SisLab1961,
           title = {On Integrating Triple Graph Grammars and OCL for Model-Driven Development},
          school = {University of Bremen},
          author = {Duc Hanh Dang},
            year = {2009},
             url = {https://eprints.uet.vnu.edu.vn/eprints/id/eprint/1961/}
}