1. Adler S (1980) Some Strangeness in the Proportion. In: Woolf H (ed) A Centennial Symposium to Celebrate the Achievements of Albert Einstein. Addison-Wesley, Reading, p 494
2. Arnison G (1983) Experimental observation of isolated large transverse energy electrons with associated missing energy at
$$\sqrt{\rm {s}}$$
s
= 540 GeV. Phys Lett B 122:103–116
3. Baekler P, Hehl FW, Mielke EW (1982) Vacuum solutions with double duality properties of a quadratic Poincaré gauge field theory. In: Ruffini R (ed) 2nd Marcel Grossmann Meeting on the Recent Progress of the Fundamental, of General Relativity (North Holland Publ., Amsterdam), p 413
4. Bernstein H, Phillips AV (1981) Fiber bundles and quantum theory. Sci Am 245(1):122–137
5. Bjorken JD, Drell SD (1964) Relativistic quantum mechanics. McGraw-Hill, San Francisco