%0 Journal Article %A Radford, Luis %T Diagrammatic Thinking: Notes on Peirce’s Semiotics and Epistemology. %J PNA %D 2008 %P 1-18 %V 3 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PNA_2008_2008_1_a0/ %G en %F PNA_2008_2008_1_a0