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3. Broda, E., Ludwig Boltzmann, Phys. i. u. Z. 10, 79 (1979).
4. Broda, E., Boltzmann, Einstein, natural law and evolution, Comp. Biochem. Physiol. 67B, 373 (1980).
5. Broda, E., Ludwig Boltzmann, Der Mann und das Werk, Mitt. Verein Gesch. Naturwiss. 1, 21 (1981).