, 1991, How mathematical foundation all but come about: a report on studies toward a phenomenological critique of Gödel's views on mathematical intuition, in T. M. Seebohm, D. Føllesdal & J. N. Mohanty (eds.), Phenomenology and the formal sciences, Dordrecht, Springer, pp. 195-213.
, 1984, Husserl and realism in logic and mathematics, Cambridge University Press, Cambridge.
, 1977, Phenomenology and logic, Cornell University Press, Ithaca.
, 1975, 'Toward a phenomenology of perception', Rice University studies 61 (3), 91-101.
, 1973a, On the phenomenological foundations of mathematics, in D. Carr & E. Casey (eds.), Explorations in phenomenology, Den Haag, Nijhoff, pp. 285-298.
, 1973b, On the phenomenological foundations of mathematics, in D. Carr & E. Casey (eds.), Explorations in phenomenology, Den Haag, Nijhoff, pp. 285-298.
, 1972a, 'Eidetic analysis, informal rigor and a phenomenological critique of Carnap's notion of explication', Philosophy and Phenomenological Research 33 (2), 48-61.