1. See, e.g., the works of Ernst Mach, Heinrich Hertz, Pierre Duhem and Henri Poincaré.
2. Karl Popper ‘The Demarcation between Science and Metaphysics’, in Conjectures and Refutations, Routledge, 1963, pp. 253 ff.
3. See, e.g., Karl Popper, The Nature of Philosophical Problems and Their Roots in Science, The British Journal for the Philosophy of Science 3,124
4. A. G. Van Melsen, From Atomos to Atom, Duquesne University Press, Pittsburg, 1952
5. Ernst Cassirer, Determinism and Indeterminism in Modern Physics, Yale University Press, New Haven, 1956