1. Borchers, H.J.: Nuovo Cimento24, 1118–1140 (1962)
2. Borchers, H.J.: Algebraic aspects of Wightman field theory. In: Sen, R.N., Weil, C. (Eds.): Statistical mechanics and field theory. Lectures given at the 1971 Haifa Summer School. New York: Halsted Press 1972
3. Wyss, W.: On Wightman's theory of quantized fields. Lectures in theoretical physics. University of Colorado, Boulder 1968. New York: Gordon and Breach 1969
4. Choquet, G.: Lectures on analysis. New York: Benjamin 1969
5. Wyss, W.: Commun. math. Phys.27, 223–234 (1972)