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  • × author_ss:"Ion, P.D.F."
  • × author_ss:"Sperber, W."
  • × year_i:[2010 TO 2020}
  1. Sperber, W.; Ion, P.D.F.: Content analysis and classification in mathematics (2011) 0.01
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    Source
    Classification and ontology: formal approaches and access to knowledge: proceedings of the International UDC Seminar, 19-20 September 2011, The Hague, The Netherlands. Eds.: A. Slavic u. E. Civallero