1. E. Husserl: Cartesian Meditations, An Introduction to Phenomenology. Translated by D. Cairns, Martin Nijhoff, The Hague 1960 (A French edition appeared in 1929, a German edition in 1949.)
2. R. Descartes: Meditationes de Prima Philosophia. Soly, Paris 1641
3. R. Specht: René Descartes. Rowohlt, Reinbek 1966, p. 17, 18
4. E. Lévinas: Le Temps et l’Autre. (Time and the Other Person). Fata Morgana, Montpellier 1979 (first edition 1946), Chap. 1. 3
5. E. Lévinas: Totalité et Infini, Essay sur l’Extériorité. (Totality and Infinity, an Essay on Exteriority). Martin Nijhoff, The Hague 1980