1. Barik N and Jena S N 1980Phys. Lett. B97 261, 265
2. Barik N and Barik B K 1981Pramana 17 489
3. Beavis D, Chu Shu-Yuan, Desai S R and Kaus P 1979Phys. Rev. D20 763
4. Berkelmann K 1980 Rapporteur talk at the 20th International Conference on High Energy Physics, Madison (to be published in the Proceedings, B. Durand, editor (American Institute of Physics))
5. Bhanot G and Rudaz S 1978Phys. Lett. B78 119