F. Lehmann, и R. Wille. Conceptual structures: applications, implementation and theory, 954, стр. 32-43. Berlin--Heidelberg--New~York, Springer--Verlag, (1995)
N. Spangenberg, K. Wolff, и S. Lübben. Psychoanalytic research by means of formal concept analysis, Special des Sigmund--Freud--Instituts, Lit Verlag, Münster, (to appear)