1. Casey, E. (2003). Taking a glance at the environment: Preliminary thoughts on a promising topic. In C. S. Brown & T. Toadvine (Eds.), Eco-phenomenology: Back to the earth itself. Albany: The State University of New York Press.
2. Dillon, M. C. (1997). Merleau-Ponty’s ontology. Evanston: Northwestern University Press.
3. Emmeche, C., Kull, K., & Stjernfelt, F. (2002). Reading Hoffmeyer, rethinking biology (=Tartu Semiotics Library 3). Tartu: Tartu University Press.
4. Husserl, E. (1991). Cartesian Meditations. An Introduction to Phenomenology, (trans: Cairns, D.). Kluwer Academic Publishers.
5. Husserl, E. (2002). Ideas pertaining to a pure phenomenology and to a phenomenological philosophy (Second Book). (trans: Rojcewicz, R., & Schuwer, A.). Kluwer Academic Publishers.