1. E. Husserl, Ideas pertaining to a Pure Phenomenology and to a Phenomenological Philosophy, First Book, F. Kersten (trans.) (The Hague: Martinus Nijhoff Publishers, 1983), § 13. Here we will use Kersten’s translation. Another translation can be suggested as well: E. Husserl, Ideas: General Introduction to Pure Phenomenology, W. R. Gibson (trans.) (New York: Macmillan, 1967).
2. Angela Ales Bello, “The Generative Principles of Phenomenology, Their Genesis, Development and Early Expansion,” p. 34, in Analecta Husserliana, Phenomenology World-Wide, Encyclopedia of Learning, Vol. LXXX, Anna-Teresa Tymieniecka (ed.) (Dordrecht/Boston/London: Kluwer Academic Publishers, 2002).
3. E. Stein also recognizes the validity of this method; Beiträge zur philosophischen Begründung der Psychologie und der Geisteswissenschaften, in Jahbrbuch für Philosophie und phänomenologische Forschung, Vol. V, Halle, 1922 and re-edited by Max Niemeyer Verlag, Tübingen, 1975.
4. E. Husserl, Ideen I, § 31.
5. E. Husserl, Ideen I § 41.