@Article{369816,
     author = "Ján Guncaga",
     title = "Theorien des Erkenntnisprozesses im Mathematikunterricht an der Grundschule = Theories of the process of gaining knowledge in mathematics education for primary level",
     year =  2013,
     volume =  ,
     number =  2,
     journal =  Edukacja Elementarna w Teorii i Praktyce : kwartalnik dla nauczycieli ,
     pages =  s. 23-34,
    }