Pape, H. Object and final cause in Peirce's semeiotic: Helmut Pape. Peirce's doctrine of signs : theory, applications, and connections.(1996).

Pape, Helmut. "Object and Final Cause in Peirce's Semeiotic: Helmut Pape." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996) .

Pape, Helmut. "Object and Final Cause in Peirce's Semeiotic: Helmut Pape." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996), .