| Article in Journal | 
  
  Bellucci, F. (2015). Neat, Swine, Sheep, and Deer: Mill and Peirce on Natural Kinds |  |  | 
          
                  | Article in Edited Collection | 
  
  De Tienne, A. (1989). Peirce's Early Semiotic Analysis of Representation |  |  | 
          
                  | Article in Journal | 
  
  de Villiers, T. (2007). Why Peirce Matters: The Symbol in Deacon's Symbolic Species |  |  | 
          
                  | Article in Journal | 
  
  Goethals, P. (2010). A multi-layered approach to speech events: the case of Spanish justificational conjunctions |  |  | 
          
                  | Article in Journal | 
  
  Loula, A. et al (2010). The Emergence of Self-organized Symbol Based Communication in Artificial Creatures |  |  | 
          
                  | Article in Journal | 
  
  Nöth, W. (2010). The Criterion of Habit in Peirce's Definitions of the Symbol |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1893-1895 [c.]). Division III. Substantial Study of Logic. Chapter VI. The Essence of Reasoning (MS [R] 409) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1895 [c.]). On the Logic of Quantity, and especially of Infinity (MS [R] 16) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1895). Short Logic: Chapter I. Of Reasoning in General (MS [R] 595) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1898). On Existential Graphs (MS [R] 484) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1899-1900 [c.]). Notes on Topical Geometry (MS [R] 142) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1902 [c.]). Reason's Rules (MS [R] 599) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1903 [c.]). Logical Tracts. No. 1. On Existential Graphs (MS [R] 491) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1903). C.S.P.'s Lowell Lectures of 1903 2nd Draught of 3rd Lecture (MS [R] 462) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1903). Lecture I [R] (MS [R] 450) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1904). Dichotomic Mathematics (MS [R] 5) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1904). Firstness, Secondness, Thirdness, and the Reducibility of Fourthness [R] (MS [R] 914) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1904). On the Foundations of Mathematics (MS [R] 7) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1904). On the Foundations of Mathematics (MS [R] 8) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1908 [c.]). A Neglected Argument for the Reality of God (G) (MS [R] 842) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (1909). Meaning Preface (MS [R] 637) |  |  | 
          
                  | Manuscript | 
  
  Peirce, C. S. (nd). Fragments [R] (MS [R] 1009) |  |  |