@article{UNY24234,
           title = {Students? Concept Maps in Abstract Algebra},
       publisher = {Departement of Mathematics Education Faculty of Mathematics and Natural Science Yogyakarta State University Karangmalang, Sleman, Yogyakarta},
          author = {. Jackson Pasini Mairing},
         journal = {International Seminar on Innovation in Mathematics and Mathematics Education},
            year = {2014},
             url = {http://eprints.uny.ac.id/24234/}
}