Publisher
Springer Science and Business Media LLC
Reference7 articles.
1. J. E. Kiskis, Phys. Rev.D12, 3583, 1975.
2. K. L. Nagy, Acta Phys. Hung.,42, 377, 1977.
3. H. Narnhofer and W. Thirring, Phys. Letters,76B, 428, 1978.
4. T. Kugo and J. Ojima, Progr. Theor. Phys. Suppl,66, 1, 1979.
5. N. Nakanishi, Publ. Math. Sci., Kyoto University,Vol.
19, No. 3, 1983.