Kleisner, Karel. “Re-Semblance and Re-Evolution: Paramorphism and Semiotic Co-Option May Explain the Re-Evolution of Similar Phenotypes”. Sign Systems Studies 38, no. 1/4 (December 1, 2010): 378–392. Accessed April 19, 2024. https://ojs.utlib.ee/index.php/sss/article/view/SSS.2010.38.1-4.13.