(o) «Die erkenntnistheoretische Position der Evolution"aren Erkenntnistheorie» Die Evolution"are Erkenntnistheorie: Bedingungen, L"osungen, Kontroversen, edited by Rupert Riedl and Franz M. Wuketis, Verlag Paul Parey, Berlin and Hamburg.
(q) Letter to the Editor about Hegel and Hitler, The Salisbury Review, July 1987.
(r) «Zur Theorie der Demokratie», Der Spiegel, 3.8.1987, Hamburg.
(t) Popper versus Copenhagen, letter in reply to Collett and Loudon, Nature,328, 20.8.1987.
(x) Objektive Erkenntnis: Ein Evolution"arer Entwurf, fifth impression, German translation of 1972 (a), Hoffmann und Campe, Hamburg.
(z2) «Toleration and Intellectual Responsibility», On Toleration, edited by Susan Mendus and David Edwards, Clarendon Press, Oxford.
(z9) «Campbell on the Evolutionary Theory of Knowledge», Evolutionary Epistemology, Rationality, and the Sociology of Knowledge, edited by G. Radnitzky and W. W. Bartley III, Open Court Publishing Co., LaSalle, Illinois, pp. 115–120.
(z 10) " Natural Selection and the Emergence о f Mind», Evolutionary Epistemology, Rationality, and the Sociology of Knowledge, edited by G. Radnitzky and W. W. Bartley III, Open Court Publishing Co., LaSalle, Illinois, pp. 139–155.
(j) «Popper on Democracy. The Open Society and its Enemies Revisited», The Economist, 23.4.1988, pp. 25–28. (Title not chosen by the author.)
(w) Bemerkungen zu Theorie und Praxis des demokratischen Staates, Lecture given in Munich on 9.6.1988, published by Bank Hof mann AG, Z"urich.
(i) Quantum Theory and the Schism in Physics, From the Postscript to the Logic of Scientific Discovery, edited by W. W. Bartley III, Unwin Hyman, London. (First paperback edition of 1982 (b).)
(r) «Zwei Bedeutungen von Falsifizierbarkeit», Handlexikon zur Wissenschaftstheorie», edited by Helmut Seiffert and Gerard Radnitzky, Ehrenwirt GmbH Verlag, Munich, pp. 82–86.
(u) Conjectures and Refutations, fifth edition (revised and corrected), Routledge, London. (Eleventh impression.)
(v) Popper on Schr^odinger, Nature,342, 23.11.1989.
(x) «On a Little Known Chapter of Mediterranean History», Catalonia, No. 15, pp. 31–37, Centre Unesco de Catalunya, Barcelona.
(z) «Creative Self-Criticism in Science and in Art», Diogenes, 145, Casalini Libri, Fiesole, pp. 36–45.
(z3)Das Ich und sein Gehirn, with John C. Eccles, German translation of 1977 (u), ninth edition, R. Piper & Co., Munich.
(z4)The Open Society and Its Enemies, I Routledge, London. (Eighth reprint of the fifth [revised 1966] edition.)
(z5) The Poverty of Historicism, thirteenth impression, Ark paperbacks (an imprint of Routledge & Kegan Paul), London and New York.
(f) A World of Propensities, Thoemmes, Bristol. Two lectures, revised and extended: 1. «A World of Propensities: Two New Views of Causality», delivered at the 1988 World Congress of Philosophy at Brighton, and 2. «Towards an Evolutionary Theory of Knowledge», delivered at the London School of Economics on 9.6.1989.
(g) «Pyrite and the origin of life», Nature, 344, No. 6265, p. 387, 29.3.1990.
(z5) «ProgenoteorProtogenote?" withDr. G"unter W"achtersh"auser, Science, 250/4984 («Letters»), 23.11.1990, p. 1070.
(b) «Kepler: Seine Metaphysik des Sonnensystems und seine empirische Kritik», Wege der Vernunft, Festschrift zum 70. Geburtstag von Hans Albert, J. С. B. Mohr (Paul Siebeck), T"ubingen.
(d) «R'evolutions scientifiques et r'evolutions id'eologiques», Introduction to Karl Popper: Science et Philosophie, edited by Ren'ee Bouveresse and Herv'e Barreau, Librairie Philosophique J. Vrin, Paris.
(e) The Open Society and Its Enemies, I, Routledge, London. (Ninth reprint of the fifth [revised 1966] edition.)
(n) The Poverty of Historicism, fourteenth impression, Routledge, London and New York.
(o) «Ich weiss, dass ich nichts weiss — und kaum das»: Karl Popper im Gespr"ach "uber Politik, Physik und Philosophie, Ullstein GmbH, Berlin. (Two interviews with Die Welt, in 1987 and 1990.)
(e) «Gegen den Zynismus in der Interpretation der Geschichte», Eichst"atter Materialien, Verlag Friedrich Pustet, Regensburg. Lecture given at the Catholic University of Eischst"att on 27 May 1991 on the occasion of being awarded an honorary doctorate.
(k) «How the Moon Might Throw Some of her Light Upon the Two Ways of Parmenides», Classical Quarterly, 42, No. 1, Oxford University Press, Oxford. In Search of a Better World: Lectures and Essays from Thirty Years, Routledge, London and New York. Translation of 1984 (b) by Laura J. Bennett, additional material translated by Melitta Mew. First English edition.
(z3) La lezione di questo secolo. Interview by Giancarlo Bosetti, Marsilio Editori, Venice. Also contains translation of 1888 (w) and 1990 (z).
(v) «Discussion of the Mind-Brain Problem», K. R. Popper, P. Arhem, and В. I. B. Lindahl, Theoretical Medicine, 14, No. 2, Kluwer Academic Publishers, Dordrecht.
(h) Die beiden Grundprobleme der Erkenntnistheorie, second revised edition, J. С. B. Mohr, T"ubingen.