Physics Letters. B. Particle Physics, Nuclear Physics and Cosmology (Phys. Lett. B) (19930101), 317, no.~1-2, 73-77. ISSN: 0370-2693 (print).eISSN: 1873-2445.
Physics Letters. B. Particle Physics, Nuclear Physics and Cosmology (Phys. Lett. B) (19930101), 317, no.~1-2, 64-72. ISSN: 0370-2693 (print).eISSN: 1873-2445.