%0 Journal Article %A Barbara BaraƄska %T Phenomenology of mathematical concepts: a historical perspective on curves and tangents %J Didactica Mathematicae %D 2023 %P 111-156 %V 45 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/dm.v45i0.7289/ %R 10.14708/dm.v45i0.7289 %G pl %F 10_14708_dm_v45i0_7289