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%Aigaion2 BibTeX export from 
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@TECHREPORT{,
       author = {Fernández-Madrigal, Juan-Antonio},
        month = nov,
        title = {A Mathematical Formulation of Not-Restricted, Multiple Abstraction Based on Graphs. Application to Graph Isomorphism},
         year = {2004},
  institution = {System Engineering and Automation Dpt. - University of Málaga (Spain)}
}