Tenorio, J.R. 2014. Writing of a aporia. Transits and obstructions in Existential Graphs of Charles S. Peirce. Pensamiento. Revista de Investigación e Información Filosófica. 70, 262 (May 2014), 177–196. DOI:https://doi.org/10.14422/pen.v70.i262.y2014.009.