Maurin, K., & Raczka, R. (1976). Mathematical physics and physical mathematics: Proceedings of the international symposium organized by the Mathematical Institute of the Polish Academy of Sciences, the Institute for Nuclear Research, and University of Warsaw, held in Warsaw 25-30 March, 1974. Dordrecht ;: D. Reidel Pub. Co..

Maurin, Krzysztof, and Ryszard Raczka. Mathematical Physics and Physical Mathematics: Proceedings of the International Symposium Organized By the Mathematical Institute of the Polish Academy of Sciences, the Institute for Nuclear Research, and University of Warsaw, Held in Warsaw 25-30 March, 1974. Dordrecht ;: D. Reidel Pub. Co., 1976.

Maurin, Krzysztof, and Ryszard Raczka. Mathematical Physics and Physical Mathematics: Proceedings of the International Symposium Organized By the Mathematical Institute of the Polish Academy of Sciences, the Institute for Nuclear Research, and University of Warsaw, Held in Warsaw 25-30 March, 1974. Dordrecht ;: D. Reidel Pub. Co., 1976.