Donevska-Todorova, Ana2014-06-232014-06-232014http://hdl.handle.net/2003/3344710.17877/DE290R-6852deGesellschaft für Didaktik der MathematikMathematikunterrichtLineare AlgebraMathematikdidaktik510Three Modes of Description and Thinking of Linear Algebra Concepts at Upper Secondary Educationconference contribution